(Reprinted from the Jan. 27, 2006 NLM Technical Notes Bulletin)

Author manuscripts for published articles were added to PubMed Central, NIH digital archive of life sciences journal literature, beginning in July 2005 (see article: PubMed® Links to Author Manuscripts in PMC®. NLM Tech Bull. 2005 Jul-Aug;(345):e3.).
A new status tag, [PubMed - author manuscript in PMC], will appear on PubMed citations for articles that would not normally be cited in PubMed because they are from journals that are:
a) not indexed for MEDLINE
or
b) do not participate in PMC.

This small number of citations can be retrieved using the search: pubstatusnihms. As these citations are processed, the status tag will change as appropriate, with a final designation of [PubMed]. To retrieve all citations in PubMed for which author manuscripts are available in PMC, use the search: author manuscript [sb].