title: The nature of PDQ.
authors.forename: S
authors.initials: S
authors.lastname: Dwiggins
authors.forename: B J
authors.initials: BJ
authors.lastname: Harding
mesh_terms: D000043:Abstracting and Indexing; D016206:Databases, Bibliographic; D006801:Humans; D016247:Information Storage and Retrieval; D008523:MEDLARS; D009317:National Library of Medicine (U.S.); D009369:Neoplasms; D014481:United States