1. Division of Rheumatology and Immunology, Department of Physical Medicine and Rehabilitation, Sakarya University, Faculty of Medicine, Sakarya, Turkey,
2. Department of Physical Medicine and Rehabilitation, Karadeniz Technical University, Faculty of Medicine, Trabzon, Turkey,
3. Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Dicle University, Faculty of Medicine, Diyarbakir, Turkey,
4. Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Erciyes University, Faculty of Medicine, Kayseri, Turkey, and
5. Erenkoy Physical Medicine and Rehabilitation Hospital, Faculty of Health Sciences, Association of Public Hospitals Northern Anatolian Region of Istanbul, Istanbul, Turkey