1. Divisions of Endocrinology, Department of Medicine and Pediatrics and the General Clinical Research Center (C.W., C.A., N.B., G.L., A.L., P.W.N.L., L.H., R.S.S.), Harbor-University of California at Los Angeles (UCLA) Medical Center and Los Angeles Biomedical Research Institute, Torrance, California 90509
2. UCLA Olympic Analytical Laboratory (D.H.C., B.S., K.S.), Los Angeles, California 90025
3. The Center for Human Nutrition (D.H.), Los Angeles, California 90095