1. Department of Physical Medicine and Rehabilitation, Ankara City Hospital, University of Health Sciences, Ankara, Turkey.
2. Department of Physical Medicine and Rehabilitation, Gulhane Training and Research Hospital, Ankara, Turkey.
3. Department of Biostatistics, Faculty of Medicine, University of Sakarya, Sakarya, Turkey.
4. Department of Physical Medicine and Rehabilitation, Ankara Training and Research Hospital, University of Health Sciences, Ankara, Turkey.