1. Division of Endocrinology (C.O., K.S., Å.T., J.I., O.I., J.S.), Institute of Medicine, Sahlgrenska University Hospital, SE-41345 Gothenburg, Sweden
2. Musculoskeletal Disease Center (S.M.), Jerry L. Pettis Memorial VA Medical Center, Loma Linda, California 92375
3. Institute of Neuroscience and Physiology (J.-O.J.), University of Gothenburg, SE-41345 Gothenburg, Sweden