RD

• CellosaurusCC BY 4.0. Cellosaurus's README: "we have chosen to apply the Creative Commons Attribution 4.0 International (CC BY 4.0) license to Cellosaurus (https://creativecommons.org/licenses/by/4.0/). This means that you are free to copy and redistribute Cellosaurus in any medium or format. You can remix, transform, and build upon Cellosaurus for any purpose, even commercially. You must give appropriate credit, provide a link to the license, and indicate if changes were made." Copyright (c) CALIPHO group, SIB Swiss Institute of Bioinformatics. Read on 14 Nov 2026 at https://ftp.expasy.org/databases/cellosaurus/README
• PubMed Central's articlesEach article's own license. Its words show only under CC0, CC BY or public domain
• NLM's PMC Article DatasetsNLM's PMC Article Datasets on AWS, https://registry.opendata.aws/ncbi-pmc. Its terms: users "acknowledge NLM as the source of the data in a clear and conspicuous manner", do not use the PubMed Central wordmark or the PMC logo, do not "indicate or imply that NLM/NIH/HHS has endorsed" a product, and "only distribute data that are licensed for redistribution". Each article keeps its own license: https://pmc.ncbi.nlm.nih.gov/about/copyright/
• PubMedNLM's terms

Cellosaurus, SIB Swiss Institute of Bioinformatics, https://www.cellosaurus.org, CC BY 4.0. Its problem notes are given in its own words.