1. Copenhagen Lupus and Vasculitis Clinic, Center for Rheumatology and Spine Diseases, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
2. Center for Statistical Science, Peking University, Beijing, China
3. Section of Biostatistics, University of Copenhagen, Copenhagen, Denmark
4. Department of Infectious Diseases, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
5. Department of Nephrology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
6. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark