aDivision of Clinical Medicine, School of Medicine and Population Health

bCentre for Metabolic Bone Diseases, University of Sheffield, Sheffield, UK

cFast and Chronic Programmes, Alexandra Hospital, Queenstown

dDivision of Endocrinology, Department of Medicine, National University Health System, Singapore, Singapore

Correspondence to Prof. Eugene McCloskey, Division of Clinical Medicine, School of Medicine and Population Health, University of Sheffield, Sheffield, S10 2RX, UK. E-mail: [email protected]