[1] Univ Sheffield, Dept Oncol & Metab, Mellanby Ctr Bone Res, Beech Hill Rd, Sheffield S10 2RX, S Yorkshire, England
[2] Univ Oxford, Kennedy Inst Rheumatol, Oxford, England
[3] Imperial Coll London, Inst Clin Sci, Integrat Skeletal Physiol Grp, London, England
[4] MRC, Ctr Clin Sci, Du Cane Rd, London, England