Frank Verhoeven1, Mickaël Chouk2, Daniel Wendling3. 1. Department of Rheumatology, Centre Hospitalier Régional Universitaire (CHRU) de Besançon, Besançon, France; 2. Department of Rheumatology, CHRU de Besançon, Besançon, France; 3. Department of Rheumatology, CHRU de Besançon, Besançon, France. dwendling@chu-besancon.fr.