Ward Mary H, Wartenberg Daniel
Department of Health and Human Services, Division of Cancer Epidemiology and Genetics, Occupational and Environmental Epidemiology Branch, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
Am J Epidemiol. 2006 Aug 1;164(3):208-11. doi: 10.1093/aje/kwj183. Epub 2006 May 17.