1. Department of Medicine, Division of Cardiology (A.S., F.B., A.G., J.P.), Karolinska Institute, S-171 76 Stockholm, Sweden
2. Department of Molecular Medicine and Surgery, Division of Integrative Physiology (F.S., L.A.-K.), Karolinska Institute, S-171 76 Stockholm, Sweden
3. Division of Endocrinology and Diabetology (H.W., S.E.), Karolinska Institute, S-171 76 Stockholm, Sweden
4. Department of Physiology and Pharmacology (A.K.), Karolinska Institute, S-171 76 Stockholm, Sweden