[1] Catholic Univ Louvain, St Luc Univ Hosp, Rheumatol Unit, B-1200 Brussels, Belgium
[2] Hop Henri Mondor, Dept Rheumatol, F-94010 Creteil, France
[3] Fac Med, Dept Clin Trials Methodol, Marseille, France
[4] Hosp Mar & Esperanza, IMAS, Serv Reumatol, Barcelona, Spain
[5] Hop Univ Gand, Dept Endocrinol, Ghent, Belgium
[6] Hop Univ Gand, Unite Osteoporose & Metab Osseux, Ghent, Belgium
[7] Erasmus Univ, Dept Gen Practice, NL-3000 DR Rotterdam, Netherlands
[8] Univ Innsbruck, Dept Pharmacol, A-6020 Innsbruck, Austria
[9] Max Grundig Klin, Facharzt Innere Med, Buhl, Germany
[10] Univ Liege, WHO, Collaborating Ctr Publ Hlth Aspecs Rheumat Dis, Dept Publ Hlth Epidemiol & Hlth Econ, B-4000 Liege, Belgium
[11] CHU La Pitie Salpetriere, Paris, France
[12] SPODOM, Portugese Soc Metab Bone Dis, Lisbon, Portugal
[13] Univ Tours, F-37041 Tours, France