1. From the Department of Clinical Research, Abbott Laboratories, N. Chicago, III., the Department of Medicine, Tulane University School of Medicine, New Orleans, La., the Endocrinology Section of the Medical Service and Endocrine and Polypeptide Laboratories, Veterans Administration Hospital, New Orleans, La., the Department of Medicine, University of Rochester Medical Center, Rochester, N.Y., the Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pa., and the Department...