[1] Univ Basel, Dept Biomed, Clin Immunol Lab, Basel, Switzerland
[2] Univ Hosp Lausanne, Clin Immunol, Lausanne, Switzerland
[3] Univ Hosp Bern, Dept Nephrol, Bern, Switzerland
[4] Univ Hosp Geneva, Clin Immunol, Geneva, Switzerland
[5] Univ Basel Hosp, Div Internal Med, Basel, Switzerland