1 Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 2HH, United Kingdom. Electronic address: Roger.Francis@ncl.ac.uk.
2 Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne NE2 2HH, United Kingdom; Musculoskeletal Unit, Freeman Hospital, Newcastle upon Tyne NE7 7DN, United Kingdom.
3 National Osteoporosis Society, Bath BA2 0PJ, United Kingdom.
4 Norwich Medical School, University of East Anglia, Norwich NR4 7TJ, United Kingdom.
5 Department of Medicine, University Hospitals Birmingham, NHS Foundation Trust, Birmingham B15 2TH, United Kingdom.
6 Oxford NIHR Musculoskeletal BRU, NDORMS, University of Oxford, Oxford OX3 7HE, United Kingdom.
7 Musculoskeletal Research, University of Aberdeen, Aberdeen AB25 2ZD, United Kingdom.
8 Department of Rheumatology, Epsom and St. Helier University Hospital, Carshalton, Surrey SM5 3AA, United Kingdom.
9 Institute of Human Development, University of Manchester and Department of Medicine, Manchester Royal Infirmary, Oxford Road, Manchester M13 9WL, United Kingdom.
10 Womens Services & Arthritis Centre, London North West Healthcare NHS Trust, Harrow HA1 3UJ, Middlesex, United Kingdom.