1. Institute for Biomechanics, ETH Zurich; Zurich Switzerland
2. Division of Epidemiology, Department of Health Sciences Research; College of Medicine, Mayo Clinic; Rochester MN USA
3. Division of Endocrinology, Metabolism and Nutrition, Department of Internal Medicine; College of Medicine, Mayo Clinic; Rochester MN USA
4. Division of Rheumatology, Department of Internal Medicine; College of Medicine, Mayo Clinic; Rochester MN USA