1. From the Department of Medicine, Division of Endocrinology and Metabolism, the university of Texas Health Science Center, San Antonio, Tex., and the Department of Medicine, Repatriation General Hospital, West Heidelberg, Victoria, Australia. Address reprint requests to Dr. Mundy at the Department of Medicine, Division of Endocrinology and Metabolism, the University of Texas Health Science Center, 7703 Floyd Curl Dr., San Antonio, TX 78284.