1 Nuffield Dept. of Surgical Sciences & Nuffield Dept. of Orthopaedics, Rheumatology & Musculoskeletal Sciences, University of Oxford, Botnar Research Centre, Oxford, UK. Electronic address: claire.edwards@ndorms.ox.ac.uk.
2 Division of Endocrinology, Diabetes, Metabolism and Nutrition & Robert and Arlene Kogod Center on Aging, Mayo Clinic College of Medicine, Rochester, MN, USA. Electronic address: drake.matthew@mayo.edu.