J Clin Epidemiol. 2002 Apr;55(4):423-4; author reply 424-5. doi: 10.1016/s0895-4356(01)00488-7.
Journal of clinical epidemiology
Sander Greenland
PMID: 11927214 DOI: 10.1016/s0895-4356(01)00488-7
[No abstract available.]