Affiliation: | 1. Division of Rheumatology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA;2. Department of Nephrology and Clinical Immunology, RWTH University of Aachen, Aachen, Germany;3. Division of Pediatric Rheumatology and Immunology, Children''s Hospital Dresden, Dresden, Germany;4. Department of Pediatrics, Division of Allergology and Immunology, RWTH University of Aachen, Aachen, Germany |