1. Section of Endocrinology, Diabetes and Metabolism (B.S., A.B.S.), College of Medicine, University of Illinois at Chicago, Chicago, Illinois 60612;
2. Department of Medicine (B.S.), Mercy Hospital and Medical Center, Chicago, Illinois 60616;
3. Division of Cancer Epidemiology and Genetics (E.R.), National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892