1. Department of Medicine (A.V.S., M.K., M.Z.), Tulane University School of Medicine, New Orleans, Louisiana 70146
2. Department of Medicine (R.D.K., L.A.F.), University of Illinois at Chicago, Chicago, Illinois 60612
3. Endocrine, Polypeptide and Cancer Institute (A.V.S., K.G.), Veterans Administration Medical Center, New Orleans, Louisiana 70146