1. Diabetes, Endocrinology and Obesity Branch National Institute of Diabetes and Digestive and Kidney Diseases National Institutes of Health Bethesda Maryland
2. Clinical and Investigative Orthopedics Surgery Unit National Institute of Arthritis and Musculoskeletal and Skin Diseases National Institutes of Health Bethesda Maryland
3. Section on Congenital Disorders National Institutes of Health Clinical Center Bethesda Maryland
4. Biostatistics and Clinical Epidemiology Service National Institutes of Health Clinical Center Bethesda Maryland