1. Departments of Cardiovascular Medicine (K.W., A.B., T.S., E.D.), University of Bern, CH-3010 Bern, Switzerland
2. University Hospital Bern, and Department of Physiology (J.P.K.), University of Bern, CH-3010 Bern, Switzerland
3. Division of Nephrology and Department of Medicine (A.Z.), Centre Hospitalier Universitaire Vaudois and University of Lausanne, CH-1011 Lausanne, Switzerland
4. Department of Endocrinology (B.C., P.D.), University of Bern, CH-3010 Bern, Switzerland