[1] Inst Rheumatol, Dept Expt & Clin Rheumatol, Prague 2, Czech Republic
[2] Univ Erlangen Nurnberg, Dept Internal Med 3, D-91054 Erlangen, Germany
[3] Univ Erlangen Nurnberg, Inst Clin Immunol, D-91054 Erlangen, Germany
[4] Univ Zurich Hosp, Ctr Expt Rheumatol, CH-8091 Zurich, Switzerland
[5] Univ Zurich Hosp, Zurich Ctr Integrat Human Physiol, CH-8091 Zurich, Switzerland