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List of Serials Indexed for Online Users (LSIOU)

Published by National Library of Medicine | U.S. Department of Health & Human Services | Metadata Last Checked: August 08, 2025 | Last Modified: 2025-06-18
The List of Serials Indexed for Online Users (LSIOU) provides bibliographic information for all journals whose articles were ever indexed over time with the MeSH® vocabulary and cited in MEDLINE®, the backbone of the NLM PubMed® database. It includes titles that ceased publication, changed titles, or are no longer indexed. More detailed bibliographic data and information about indexing coverage for serials cited in MEDLINE/PubMed can be found in LocatorPlus Catalog®, the NLM online catalog, and the NLM Catalog, an Entrez database.

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