M Usser. Show Affiliations »
Abstract
Entities: Disease
Mesh: See more » Epidemiologic MethodsEthnologyHumansPeptic Ulcer/epidemiologyPeptic Ulcer/etiologyPsychologyRetrospective StudiesSociology
Year: 1967 PMID: 5338692 DOI: 10.1016/0021-9681(67)90015-x
Source DB: PubMed Journal: J Chronic Dis ISSN: 0021-9681