[1] Univ Amsterdam, Div Clin Immunol & Rheumatol, Acad Med Ctr, NL-1105 AZ Amsterdam, Netherlands
[2] Jan van Breemen Inst, Amsterdam, Netherlands
[3] Univ Amsterdam, Dept Dermatol, Acad Med Ctr, NL-1105 AZ Amsterdam, Netherlands
[4] Sanquin Res, Amsterdam, Netherlands
[5] Vrije Univ Amsterdam, Dept Rheumatol, Med Ctr, Amsterdam, Netherlands