1. Department of Statistics, University of Virginia (D.M.K.), Charlottesville, Virginia 22903
2. Primary Care Internal Medicine, Department of Internal Medicine (P.Y.T.), Mayo School of Graduate Medical Education, General Clinical Research Center, Mayo Clinic, Rochester, Minnesota 55905
3. Endocrine Research Unit (P.Y.L., P.D.R., J.D.V.), Mayo School of Graduate Medical Education, General Clinical Research Center, Mayo Clinic, Rochester, Minnesota 55905
4. Department of Urology (A.X.N.), Mayo School of Graduate Medical Education, General Clinical Research Center, Mayo Clinic, Rochester, Minnesota 55905
5. Endocrine Service, Medical Section, Salem Veterans Affairs Medical Center (A.I.), Salem, Virginia 24153