Samuel Shapiro1. Show Affiliations » 1. Department of Epidemiology, University of Cape Town, Cape Town, South Africa. samshap@mweb.co.za
Abstract
Mesh: See more » BiasCase-Control StudiesCausalityConfounding Factors, EpidemiologicEpidemiologic MethodsHumans
Year: 2008 PMID: 18413019
Source DB: PubMed Journal: J Fam Plann Reprod Health Care ISSN: 1471-1893