1. From the Department of Endocrinology Metabolism, Eberhard‐Karls‐University, Tubingen, Germany;
2. Department of Diabetes, Metabolism, and Vascular Medicine, Albert‐Schweitzer‐Klinik, Ko¨nigsfeld, Germany;
3. Muscle Metabolism Laboratory, Department of Physiology, University of Arizona College of Medicine, Tucson, AZ