J M Bland1, S M Kerry. Show Affiliations » 1. Department of Public Health Sciences, St George's Hospital Medical School, London.
Abstract
Mesh: See more » Cluster AnalysisHumansRandomized Controlled Trials as Topic/methodsResearch Design
Year: 1997 PMID: 9302962 PMCID: PMC2127388 DOI: 10.1136/bmj.315.7108.600
Source DB: PubMed Journal: BMJ ISSN: 0959-8138