1. Division of Endocrinology and Diabetes, Department of Internal Medicine, Hôpital Cantonal Universitaire, Rue Micheli-du-Crest 24,1211 Genève 14, Switzerland
2. Abteilung Innere Medizin, Kreis Spital Bülach, 8180 Bülach, Switzerland
3. Sevice de Médecine Interne, Hôpital Regional de Martigny-Entremont, av de la Fusion 27, 1920 Martigny, Switzerland