title: Excerpta Medica on-line by Informatics, Inc.
authors.forename: A W
authors.initials: AW
authors.lastname: Ball
authors.forename: M A
authors.initials: MA
authors.lastname: Wolfe
mesh_terms: D000043:Abstracting and Indexing; D004346:Drug Information Services; D007255:Information Services; D007256:Information Systems; D009862:Online Systems