A Morabia. Show Affiliations »
Abstract
Mesh: See more » BiasConfounding Factors, Epidemiologic
Year: 1992 PMID: 1303646 PMCID: PMC1883835 DOI: 10.1136/bmj.305.6863.1225-c
Source DB: PubMed Journal: BMJ ISSN: 0959-8138