Douglas G Altman1, J Martin Bland. Show Affiliations » 1. Centre for Statistics in Medicine, University of Oxford, Oxford OX2 6UD. doug.altman@csm.ox.ac.uk
Abstract
Mesh: See more » Mathematics/methodsResearch Design/standardsSelection Bias
Year: 2011 PMID: 21835875 DOI: 10.1136/bmj.d570
Source DB: PubMed Journal: BMJ ISSN: 0959-8138