Paper Citation Record · LEDGER

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research

As of 11 August 2026, this Paper Citation Record lists 46 of 46 outbound references and 0 inbound Pith citation observations for arXiv:2506.03698.

A citation records a reference. It does not transfer a finding from one paper to another.

pith.paper-citation-record.v1
2506.03698 v1

Coverage vector

measured 46 of 46 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-08-07T10:58:53.863506Z

measured 46 of 46 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-10T06:31:04.303077+00:00

measured 0 of 0 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: cited_works

Reference resolution

46 of 46 outbound references displayed

verified exact0
verified fuzzy38
unresolved7
parse uncertain0
malformed identifier0
metadata mismatch1

External citation measurements

No source-named external measurement is stored.

Outbound references

Observation ac7f0bfe-2e25-42b6-b0cd-8ef50e01bc51 · outbound

This paper cites International Journal of Multidisciplinary Sciences and Arts 2(2), 60–70 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research International Journal of Multidisciplinary Sciences and Arts 2(2), 60–70 (2023)

Reference 1

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:04.394250Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 50bce7cc-cdd4-446c-84a6-67276c5db5a0 · outbound

This paper cites Vision Foundation Models in Medical Image Analysis: Advances and Challenges.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Vision Foundation Models in Medical Image Analysis: Advances and Challenges

Reference 2

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:47.967225Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation df3fcda6-349a-4696-b03d-b0a94cab4fbf · outbound

This paper cites Cardiology clinics 24(3), 491–504 (2006).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Cardiology clinics 24(3), 491–504 (2006)

Reference 3

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:04.179497Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 0710735b-c8b0-45ff-a157-cdd7f6003827 · outbound

This paper cites Annual review of biomedical engineering 19(1), 221–248 (2017).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Annual review of biomedical engineering 19(1), 221–248 (2017)

Reference 4

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:03.913034Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation e73bd158-b263-437d-a25a-24a9dd96c852 · outbound

This paper cites Information 15(12), 755 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Information 15(12), 755 (2024)

Reference 5

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:03.699257Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 283d8a06-b007-453d-b610-52a2b501177e · outbound

This paper cites Proceedings of the IEEE 86(11), 2278–2324 (1998).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Proceedings of the IEEE 86(11), 2278–2324 (1998)

Reference 6

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:48.492552Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation 20dcd533-ccc0-4e93-99ac-71f82ab64151 · outbound

This paper cites Cognitive science 14(2), 179–211 (1990).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Cognitive science 14(2), 179–211 (1990)

Reference 7

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:48.599523Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation 566deb33-74e7-4018-9a1f-9e1cb258a645 · outbound

This paper cites Advances in neural information processing systems 27 (2014).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Advances in neural information processing systems 27 (2014)

Reference 8

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:03.466223Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 352350b4-d749-4775-a098-8f4c7e07a141 · outbound

This paper cites Physics in Medicine & Biology 68(17), 175020 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Physics in Medicine & Biology 68(17), 175020 (2023)

Reference 9

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:03.253594Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation e057a6be-db34-4599-8eef-2e860c165100 · outbound

This paper cites Medical Image Analysis 90, 102953 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Medical Image Analysis 90, 102953 (2023)

Reference 10

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:03.014358Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation b37f82ac-4234-400f-982c-30bba1592dd7 · outbound

This paper cites European radiology 33(1), 321 –329 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research European radiology 33(1), 321 –329 (2023)

Reference 11

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:02.707771Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation a6eff4cc-35a5-4047-aaf0-fb55cd9ae2f1 · outbound

This paper cites Cardiovascular Imaging 17(8), 894–906 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Cardiovascular Imaging 17(8), 894–906 (2024)

Reference 12

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:02.459493Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 3b07021e-424b-4f14-b9fd-1e0d19e31dd9 · outbound

This paper cites Insights into Imaging 15(1), 1–12 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Insights into Imaging 15(1), 1–12 (2024)

Reference 13

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:02.228517Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation d908da4d-2408-4270-9aa1-50c2f6e58736 · outbound

This paper cites Nature Communications 15(1), 2747 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature Communications 15(1), 2747 (2024)

Reference 14

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:01.941650Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 4e6f7fd2-9323-4713-a5e1-26d49765188b · outbound

This paper cites Radiology: Artificial Intelligence 5(5), 230024 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Radiology: Artificial Intelligence 5(5), 230024 (2023)

Reference 15

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:01.602671Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation d4688e1e-538e-43f7-8965-0ea082c53c45 · outbound

This paper cites Magnetic resonance in medicine 86(5), 2837–2852 (2021).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Magnetic resonance in medicine 86(5), 2837–2852 (2021)

Reference 16

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:01.325755Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 6a9c6796-e52b-4db3-8781-a886a83e4c99 · outbound

This paper cites Cardiovascular Imaging 15(3), 413–427 (2022).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Cardiovascular Imaging 15(3), 413–427 (2022)

Reference 17

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:01.074893Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 35bd0eaf-9d95-4495-a73f-3064f7fac0cb · outbound

This paper cites Cardiovascular Imaging 16(10), 1288–1302 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Cardiovascular Imaging 16(10), 1288–1302 (2023)

Reference 18

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:00.730427Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation f45af7e1-26a3-4749-a6c3-337065bfeff2 · outbound

This paper cites Nature Medicine 30(5), 1471 – 1480 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature Medicine 30(5), 1471 – 1480 (2024)

Reference 19

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:00.448275Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation fca6305f-0e2a-41e5-ae7f-4d647caf9b50 · outbound

This paper cites Nature communications 11(1), 1760 (2020).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature communications 11(1), 1760 (2020)

Reference 20

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:59:00.158727Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation c4ba4c69-e7fb-4b2b-be32-c7cee77b8799 · outbound

This paper cites Journal of the American College of Cardiology 75(7), 722–733 (2020).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Journal of the American College of Cardiology 75(7), 722–733 (2020)

Reference 21

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:59.915805Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation def9a6c6-e9c0-4ee0-b4e0-6e864ea96f4f · outbound

This paper cites The Lancet 394(10201), 861–867 (2019).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research The Lancet 394(10201), 861–867 (2019)

Reference 22

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:59.614408Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 1c2706db-32f4-4cf3-8bed-52a35608f6b7 · outbound

This paper cites In: 2017 Computing in Cardiology (cinc), pp.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research In: 2017 Computing in Cardiology (cinc), pp

Reference 23

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:59.353128Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation e714572b-d3c5-4b7b-accb-e6d2f0b4f2b3 · outbound

This paper cites Nature medicine 25(1), 70–74 (2019).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature medicine 25(1), 70–74 (2019)

Reference 24

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:59.049415Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 4f0ebcb1-1274-4c5f-8904-6fd5c984929b · outbound

This paper cites Circulation 129(25 suppl 2), 49–73 (2014).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Circulation 129(25 suppl 2), 49–73 (2014)

Reference 26

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:58.568562Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 6591f207-1509-4218-8282-f5ff88dc06b7 · outbound

This paper cites Circulation: Genomic and Precision Medicine 14(2), 003304 (2021).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Circulation: Genomic and Precision Medicine 14(2), 003304 (2021)

Reference 27

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:58.287576Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation e6da4444-9a88-4cb3-bcb6-8569ab252027 · outbound

This paper cites NPJ digital medicine 6(1), 169 (2023).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research NPJ digital medicine 6(1), 169 (2023)

Reference 28

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:58.826757Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 9de73fe1-a3eb-4259-975e-7f2542721ae6 · outbound

This paper cites IEEE Transactions on Industrial Informatics 17(11), 7771–7780 (2021).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Transactions on Industrial Informatics 17(11), 7771–7780 (2021)

Reference 29

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:58.023616Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 546ebf6d-236b-476d-998a-e1f01ee72264 · outbound

This paper cites IEEE Journal of Biomedical and Health Informatics 26(11), 5540 – 5550 (2022).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Journal of Biomedical and Health Informatics 26(11), 5540 – 5550 (2022)

Reference 30

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:57.709477Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 57bd511e-ad98-420f-8193-78e5bf7542b5 · outbound

This paper cites In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research In: Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition, pp

Reference 31

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:57.441322Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 84658a41-5ac3-4c8a-993c-565f7834ac99 · outbound

This paper cites Neurocomputing 579, 127443 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Neurocomputing 579, 127443 (2024)

Reference 32

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:57.182632Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 2f5aa9a4-1bce-4848-a06b-c87abe91797a · outbound

This paper cites IEEE Journal of Biomedical and Health Informatics (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Journal of Biomedical and Health Informatics (2024)

Reference 33

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:56.898227Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation c3e69446-29db-44ba-91d5-8f10e0f4f9a2 · outbound

This paper cites In: International Conference on Intelligent Computing, pp.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research In: International Conference on Intelligent Computing, pp

Reference 34

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:56.650634Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 9c48a3ea-24d1-4234-8cc7-5d78f8ea12ae · outbound

This paper cites BMC Medical Informatics and Decision Making 24(1), 128 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research BMC Medical Informatics and Decision Making 24(1), 128 (2024)

Reference 35

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:56.318054Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation c410861c-7a3b-40db-a212-e626fa875aaa · outbound

This paper cites IEEE/ACM Transactions on Computational Biology and Bioinformatics (2022).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE/ACM Transactions on Computational Biology and Bioinformatics (2022)

Reference 36

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:56.038695Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 458f92d2-d4c0-4efb-9038-b06604d95f82 · outbound

This paper cites IEEE Journal of Biomedical and Health Informatics (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Journal of Biomedical and Health Informatics (2024)

Reference 37

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:55.810169Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation c7c0153c-884c-4512-bd0f-2ee02f3a1120 · outbound

This paper cites Real-time Automatic M-mode Echocardiography Measurement with Panel Attention from Local-to-Global Pixels.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Real-time Automatic M-mode Echocardiography Measurement with Panel Attention from Local-to-Global Pixels

Reference 38

Resolution: metadata mismatch; local_arxiv, observed 2026-08-07T10:58:54.133743Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 5b49d855-614f-4ff0-b86e-526a5808288f · outbound

This paper cites IEEE Journal of Biomedical and Health Informatics (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Journal of Biomedical and Health Informatics (2024)

Reference 39

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:55.547503Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 032371ca-7e08-4cbc-983b-905ddef762a0 · outbound

This paper cites Future Generation Computer Systems 115, 825–836 (2021).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Future Generation Computer Systems 115, 825–836 (2021)

Reference 40

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:55.274133Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation b949338c-5efd-4450-87de-0884483e4800 · outbound

This paper cites IEEE Journal of Biomedical and Health Informatics (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research IEEE Journal of Biomedical and Health Informatics (2024)

Reference 41

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:53.004634Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation ac4f88ba-5ed3-4d3b-9ce4-df3ee361c220 · outbound

This paper cites In: European Conference on Computer Vision, pp.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research In: European Conference on Computer Vision, pp

Reference 42

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:54.991305Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 67b57f8e-2222-4e50-8ff4-02b833871e3b · outbound

This paper cites Nature 580(7802), 252–256 (2020).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature 580(7802), 252–256 (2020)

Reference 43

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:53.269135Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation ced88d4c-b728-452e-9fa4-a9ab5667d0d4 · outbound

This paper cites BiomedParse: a biomedical foundation model for image parsing of everything everywhere all at once.

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research BiomedParse: a biomedical foundation model for image parsing of everything everywhere all at once

Reference 44

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:53.428518Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Observation b0dc2aca-8b4c-4be2-b9eb-3c4f6097d6b1 · outbound

This paper cites Knowledge-Based Systems 293, 111664 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Knowledge-Based Systems 293, 111664 (2024)

Reference 45

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:54.731605Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation 536fecde-26a0-40da-aee0-3e790f6a3e31 · outbound

This paper cites American journal of roentgenology 174(1), 71–74 (2000).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research American journal of roentgenology 174(1), 71–74 (2000)

Reference 46

Resolution: verified fuzzy; raw_fallback, observed 2026-08-07T10:58:54.390080Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.

Observation e8443f9a-7a87-4e91-91c4-20b903db5452 · outbound

This paper cites Nature Communications 15(1), 654 (2024).

Advancements in Artificial Intelligence Applications for Cardiovascular Disease Research Nature Communications 15(1), 654 (2024)

Reference 47

Resolution: unresolved; no resolver link, observed 2026-08-07T10:58:53.863506Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

Pith citing papers

No inbound Pith citation observations are available.