B P Squires, T J Elmslie. Show Affiliations »
Abstract
Mesh: See more » BiasCase-Control StudiesPublishing/standardsResearch Design/standardsWriting
Year: 1990 PMID: 2357677 PMCID: PMC1452063
Source DB: PubMed Journal: CMAJ ISSN: 0820-3946 Impact factor: 8.262