1. Cochin Hospital, Rheumatology DepartmentParis-Descartes University ParisFrance
2. Department of RheumatologyInstitute for Physical Medicine, University Hospital ZurichSwitzerland
3. Department of Endocrinology and Metabolic DiseasesLeiden University Medical Center LeidenThe Netherlands
4. Merck & Co., Inc. Whitehouse Station, NJUSA
5. Laboratory of Experimental Medicine and Endocrinology, Katholieke Universiteit Leuven LeuvenBelgium