1. From the Department of Physiology, Anatomy and Genetics, Oxford University, Oxford, United Kingdom (AKE and HR); the Institute of Basic Medical Sciences, Department of Nutrition, University of Oslo, Oslo, Norway (EN and HR); the Department of Public Health and Primary Health Care, University of Bergen, Bergen, Norway (CGG, GST, and SEV); the Department of Rheumatology, Haukeland University Hospit