Nasrin Alinezhad1, Zahra Habibagahi2, Vahid Reza Ostovan3. 1. Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. 2. Department of Internal Medicine-Rheumatology, Shiraz University of Medical Sciences, Shiraz, Iran. 3. Clinical Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. ostovanv@gmail.com.