1. Rheumatology, Amsterdam Rheumatology and Immunology Center; Reade; Amsterdam The Netherlands
2. Department of Immunopathology, Sanquin Research and Landsteiner Laboratory; Academic Medical Centre Amsterdam; Amsterdam The Netherlands
3. Biologicals Lab; Sanquin Diagnostic Services; Amsterdam The Netherlands
4. Rheumatology, Amsterdam Rheumatology and Immunology Center; VU University Medical Center; Amsterdam The Netherlands