1. Department of Physical Medicine and Rehabilitation; Indiana University School of Medicine; Goodman Hall, 355 West 16th Street, Suite 4700 Indianapolis Indiana 46202 USA
2. Department of Rheumatology; Faculty of Medicine; Ege University; Izmir Turkey
3. Department of Physical Medicine and Rehabilitation; Indiana University School of Medicine and Rehabilitation Hospital of Indiana; Indianapolis Indiana USA
4. Department of Physical Medicine and Rehabilitation; Faculty of Medicine; Marmara University; Istanbul Turkey