[1] ARC Epidemiology Unit,
[2] Stopford Building,undefined
[3] University of Manchester,undefined
[4] Manchester,undefined
[5] M13 9PT,undefined
[6] UK Tel: +44 (0)161 2755040 Fax: +44 (0)161 2755043 e-mail: Terry@fs1.ser.man.ac.uk,undefined
[7] ARC Epidemiology Unit,undefined
[8] University of Manchester,undefined
[9] Manchester,undefined
[10] UK,undefined
[11] Department of Radiology and Nuclear Medicine,undefined
[12] Free University,undefined
[13] Berlin,undefined
[14] Germany,undefined
[15] Behring Hospital,undefined
[16] Berlin,undefined
[17] Germany,undefined
[18] Institute of Rheumatology,undefined
[19] Moscow,undefined
[20] Russia,undefined
[21] Royal National Hospital for Rheumatic Diseases,undefined
[22] Bath,undefined
[23] UK,undefined
[24] Hospital de Angra do Herismo,undefined
[25] Azores,undefined
[26] Portugal,undefined
[27] Asturia General Hospital,undefined
[28] Oviedo,undefined
[29] Spain,undefined
[30] University of Southampton,undefined
[31] Southampton General Hospital,undefined
[32] Southampton,undefined
[33] UK,undefined
[34] University Hospital,undefined
[35] Leuven,undefined
[36] Belgium,undefined
[37] Bone Metabolism Group,undefined
[38] Northern General Hospital,undefined
[39] Sheffield,undefined
[40] UK,undefined
[41] Medical Institute,undefined
[42] Yaroslavl,undefined
[43] Russia,undefined
[44] Clinic for Internal Medicine,undefined
[45] Jena,undefined
[46] Germany,undefined
[47] Department of Internal Medicine,undefined
[48] Charles University,undefined
[49] Prague,undefined
[50] Czech Republic,undefined