1 Section of Musculoskeletal Diseases, The Leeds Institute of Rheumatic and Musculoskeletal Medicine, University of Leeds and Chapel Allerton Hospital, Leeds, UK.
2 Rheumatology Division, University of Ottawa, Canada. drsibelaydin@gmail.com.
3 Department of Internal Medicine, Division of Rheumatology, Istanbul University, Istanbul Faculty of Medicine, Turkey.
4 Department of Internal Medicine, Hospital Saint-Louis, University Paris 7 - Diderot, Paris, France.
5 Department of Internal Medicine, Division of Rheumatology, Marmara University Faculty of Medicine, Istanbul, Turkey.