J M Bland1, D G Altman. Show Affiliations » 1. Department of Public Health Science, St George's Hospital Medical School, London.
Abstract
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Year: 1996 PMID: 8597743 PMCID: PMC2350526 DOI: 10.1136/bmj.312.7032.700
Source DB: PubMed Journal: BMJ ISSN: 0959-8138