[1] Univ Sheffield, Sch Med, Sheffield S10 2RX, S Yorkshire, England
[2] Univ Manchester, Manchester, Lancs, England
[3] Karolinska Inst, Med Management Ctr, Stockholm, Sweden
[4] i3 Innovus, Stockholm, Sweden
[5] Univ Southampton, MRC Epidemiol Resource Ctr, Southampton, Hants, England
[6] Stockholm Sch Econ, S-11383 Stockholm, Sweden
[7] Natl Osteoporosis Soc, Bath, Avon, England
[8] Manchester Royal Infirm, Dept Med, Manchester M13 9WL, Lancs, England
[9] Univ Cambridge, Sch Clin Med, Cambridge, England