1 Department of Core Clinical Pathology and Biochemistry, PathWest Laboratory Medicine-Royal Perth Hospital, Perth, WA, Australia; School of Pathology and Laboratory Medicine, University of Western Australia, Nedlands, WA, Australia. Electronic address: samuel.vasikaran@health.wa.gov.au.
2 School of Pharmacy and Medical Sciences, University of South Australia, Adelaide South Australia 5000, Australia.
3 MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton SO16 6YD, UK; NIHR Musculoskeletal Biomedical Research Unit, Institute of Musculoskeletal Sciences, University of Oxford, Oxford OX3 7LD, UK.
4 Centre for Metabolic Bone Diseases (WHO Collaborating Centre), University of Sheffield Medical School, Beech Hill Road, Sheffield, S10 2RX, UK.