Institution: | (1) Department of Internal Medicine, 463, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, the Netherlands;(2) Department of Immunohaematology and Blood Transfusion, Leiden University Medical Centre, Leiden, the Netherlands;(3) Department of Rheumatology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands |