[1] Univ Hosp Zurich, Ctr Expt Rheumatol, Zurich, Switzerland
[2] ETH, Funct Genom Ctr Zurich, Zurich, Switzerland
[3] Univ Zurich, Zurich, Switzerland
[4] Schulthess Clin Zurich, Zurich, Switzerland
[5] Univ Birmingham, Birmingham, W Midlands, England