1. From the Department of Endocrinology and Metabolism, Hôpital Cochin, Paris, France, the Division of Endocrinology and the Laboratory of Clinical Investigation, Hôpital Cantonal, Geneva, Switzerland, and the Department of Medical Biochemistry, Hôpital Pitié-Salpêtrière, Paris, France (address reprint requests to Dr. Strauch at Hôpital Cochin, 75 Paris 14è, France).