[1] State Hosp Korneuburg Stockerau, Karl Landsteiner Inst Clin Rheumatol, Lower Austrian Ctr Rheumatol, Dept Med 2, Stockerau, Austria
[2] Austrian Soc Rheumatol & Rehabil OGR, Stockerau, Austria
[3] Danube Private Univ, Krems, Austria
[4] Med Univ Graz, Dept Rheumatol & Immunol, Graz, Austria
[5] Med Assoc Upper Austria, Qual Management, Linz, Austria
[6] Med Univ Innsbruck, Dept Internal Med, Clin Div Internal Med 2, Tirol Kliniken GmbH, Innsbruck, Austria