C Sitthi-amorn1, V Poshyachinda. Show Affiliations » 1. Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Abstract
Mesh: See more » BiasConfounding Factors, EpidemiologicHumansSelection Bias
Year: 1993 PMID: 8101308 DOI: 10.1016/0140-6736(93)91823-5
Source DB: PubMed Journal: Lancet ISSN: 0140-6736 Impact factor: 79.321