S Greenfield. Show Affiliations »
Abstract
Mesh: See more » Clinical Trials as Topic/trendsHumansResearch Design
Year: 1989 PMID: 2710176 DOI: 10.1056/NEJM198904273201710
Source DB: PubMed Journal: N Engl J Med ISSN: 0028-4793 Impact factor: 91.245