Patterns of intra-cluster correlation from primary care research to inform study design and analysis
Journal of clinical epidemiology, 2004-08, Vol.57 (8), p.785-794 [Peer Reviewed Journal]2004 Elsevier Inc. ;2005 INIST-CNRS ;ISSN: 0895-4356 ;EISSN: 1878-5921 ;DOI: 10.1016/j.jclinepi.2003.12.013 ;PMID: 15485730
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