Letter X (1997–Present)
	XML. 1999 Nov-Dec:e4 All Fields Included in PubMed's XML Format. 2003 Mar-Apr:e14 List of Serials Indexed for Online Users (LSI) Available in XML. 2004 Mar-Apr:e1 XML format now available in the Journals Database. 2006 Mar-Apr:e4

U.S. National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894
National Institutes of Health, Department of Health & Human Services
Copyright, Privacy, Accessibility
Freedom of Information Act (FOIA)
Last updated: 31 March 2006