1. Transplantation Center, Lausanne University Hospital, 1010 Lausanne, Switzerland
2. Department of Physiology, Center for Vascular and Inflammatory Diseases, University of Maryland School of Medicine, Baltimore, MD 21201, USA
3. Service of Rheumatology, Department of Musculoskeletal Medicine, Lausanne University Hospital, University of Lausanne, 1010 Lausanne, Switzerland
4. Division of Nephrology and Hypertension, University Hospital Bern Inselspital, 3010 Bern, Switzerland
5. Swiss Systemic Lupus Erythematosus Cohort Study
6. Department of Physiology and Pathophysiology, Linz University, 4040 Linz, Austria
7. Division of Immunology and Allergy, Department of Medicine, Lausanne University Hospital, University of Lausanne, 1010 Lausanne, Switzerland