1. Dental Research Center, Dental Research Institute, Tehran University of Medical Sciences and Department of Oral and Maxillofacial Medicine, School of Dentistry, Tehran University of Medical Sciences & The Academy of Medical Sciences, Tehran, Iran.
2. Department of Physiology, School of Medicine, Aja University of Medical Sciences, Tehran, Iran.
3. Department of Neurology, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran.