[1] Univ Edinburgh, Western Gen Hosp, Inst Genet & Mol Med, Rheumat Dis Unit, Edinburgh, Midlothian, Scotland
[2] Univ Edinburgh, Western Gen Hosp, Inst Genet & Mol Med, Edinburgh Clin Trials Unit, Edinburgh, Midlothian, Scotland
[3] Univ Auckland, Dept Med, Auckland, New Zealand
[4] Glasgow Royal Infirm, Univ Dept Med, Glasgow G4 0SF, Lanark, Scotland
[5] Univ Edinburgh, Human Genet Unit, MRC, Western Gen Hosp,Inst Genet & Mol Med, Edinburgh EH8 9YL, Midlothian, Scotland
[6] Royal Liverpool Univ Hosp, Dept Clin Chem, Liverpool, Merseyside, England
[7] Univ Sydney, Dept Med, Sydney, NSW 2006, Australia
[8] Cent Sydney Area Hlth Serv, Sydney, NSW, Australia
[9] Univ Turin, Dept Med & Surg, Geriatr Sect, Turin, Italy
[10] Univ Melbourne, Geelong Hosp, Dept Clin & Biomed Sci, Melbourne, Vic, Australia
[11] Univ Salamanca, Dept Med, Unidad Med Mol, E-37008 Salamanca, Spain
[12] Hosp Univ Salamanca, RETICEF, Salamanca, Spain
[13] Sir Charles Gairdner Hosp, Dept Endocrinol & Diabet, Perth, WA, Australia