T Greenhalgh1. Show Affiliations » 1. Department of Primary Care and Population Sciences, University College London Medical School/Royal Free Hospital School of Medicine, Whittington Hospital, London. p.greenhalgh@ucl.ac.uk
Abstract
Mesh: See more » Case-Control StudiesCohort StudiesCross-Sectional StudiesPublication BiasRandomized Controlled Trials as TopicResearch Design
Year: 1997 PMID: 9253275 PMCID: PMC2127173 DOI: 10.1136/bmj.315.7102.243
Source DB: PubMed Journal: BMJ ISSN: 0959-8138