title: A retrospective cohort study of structured abstracts in MEDLINE, 1992-2006.
authors.affiliation: Cognitive Sciences Branch, Lister Hill National Center for Biomedical Communications. ripple@nlm.nih.gov
authors.forename: Anna M
authors.initials: AM
authors.lastname: Ripple
authors.forename: James G
authors.initials: JG
authors.lastname: Mork
authors.forename: Lou S
authors.initials: LS
authors.lastname: Knecht
authors.forename: Betsy L
authors.initials: BL
authors.lastname: Humphreys
mesh_terms: D000043:Abstracting and Indexing / Q000592:standards* / Q000706:statistics & numerical data; D016239:MEDLINE / Q000592:standards / Q000706:statistics & numerical data; D010506:Periodicals as Topic / Q000592:standards / Q000706:statistics & numerical data; D012189:Retrospective Studies