1. Department of Internal Medicine, Istanbul Medeniyet University, Istanbul, Turkey
2. Department of Internal Medicine, Division of Rheumatology, Istanbul Medeniyet University, Faculty of Medicine, Istanbul, Turkey
3. Department of Statistics, University of California, Riverside, CA, USA
4. Department of Internal Medicine, Division of Rheumatology, University of Ottawa Faculty of Medicine, Ottawa, ON, Canada
5. Department of Lung and Chest Diseases, Division of Allergy and Immunology, Koc University, School of Medicine, Istanbul, Turkey
6. Department of Internal Medicine, Division of Rheumatology, The Leeds Institute of the Rheumatic and Musculoskeletal Disease, University of Leeds, Faculty of Medicine, Leeds, UK
7. Ottawa Hospital Research Institute, Ottawa, ON, Canada