[1] Univ Liege, Dept Epidemiol & Publ Hlth, Liege, Belgium
[2] Univ Hosp Geneva, Div Bone Dis, Geneva, Switzerland
[3] Univ Debrecen, Med & Hlth Sci Ctr, H-4012 Debrecen, Hungary
[4] Polish Fdn Osteoporosis, Ctr Osteoporosis & Osteo Articular Dis, Bialystok, Poland
[5] St Thomas Hosp, Dept Rheumatol, London, England
[6] Semmelweis Univ, Dept Internal Med 2, H-1085 Budapest, Hungary
[7] Charite, D-13353 Berlin, Germany
[8] Univ Oviedo, Hosp Cent Asturias, Unidad Invest Metab Oseo & Min, E-33080 Oviedo, Spain
[9] Red Cross Hosp, Dept Endocrinol, Athens, Greece
[10] Ist Auxol Italiano, Ctr Metab Bone Dis, Milan, Italy
[11] Hop Edouard Herriot, Dept Rheumatol & Bone Dis, Lyon, France