1. Department of Rheumatology, Saint-Philibert Hospital, Service de Rhumatologie, Lille Catholic University, rue du Grand But, 59160 Lomme, France
2. Department of Rheumatology, Roger Salengro Hospital, Lille 2 University, rue Emile Laine, 59037 Lille Cedex, France
3. Federation of Rheumatology, Lariboisiere Hospital, Assistance Publique-Hopitaux de Paris, UFR Medicale, Paris 7 University, 75475 Paris Cedex 10, France