Metabolism Branch, National Cancer Institute, and the Clinical Endocrinology Branch, National Institute of Arthritis and Metabolic Diseases, National Institutes of Health, Bethesda, Md.
† Address requests for reprints to Dr. Leon E. Rosenberg, Dept. of Medicine, Yale University School of Medicine, New Haven, Conn.
‡ Visiting Scientist, National Institutes of Health; on leave from the Medical Professional Unit, St. Bartholomews Hospital, London, England.
* Submitted for publication June 20, 1966; accepted September 15, 1966.