[1] Univ Erlangen Nurnberg, Dept Internal Med 3, Erlangen, Germany
[2] Univ Erlangen Nurnberg, Inst Clin Immunol, Erlangen, Germany
[3] Charles Univ Prague, Inst Rheumatol, Dept Rheumatol, Fac Med 1, Prague, Czech Republic
[4] Univ Hosp Zurich, Ctr Expt Rheumatol, Zurich, Switzerland
[5] Univ Hosp Zurich, Zurich Ctr Integrat Human Physiol, Zurich, Switzerland