J Welch. Show Affiliations »
Abstract
Mesh: See more » MEDLARSSubject HeadingsUnited States
Year: 1982 PMID: 6812768 PMCID: PMC1500068 DOI: 10.1136/bmj.285.6348.1105
Source DB: PubMed Journal: Br Med J (Clin Res Ed) ISSN: 0267-0623