Zahra Vahabi1,2, M Reza Azarpazhooh3,4,5, Shima Raeesi1, Shahram Oveisgharan6, Farnaz Etesam1,7, Elahe Abedi-Taleb8, Rezvan Hashemi1. 1. Department of Geriatric Medicine, Ziaeian Hospital, Tehran University of Medical Sciences (TUMS), Abuzar St., P.O. Box 14155-6117, Tehran, Iran. 2. Memory and Behavioral Neurology Division, Roozbeh Hospital, Tehran University of Medical Sciences (TUMS), Tehran, Iran. 3. Stroke Prevention and Atherosclerosis Research Centre, Robarts Research Institute, Western University, London, ON Canada. 4. Department of Clinical Neurological Sciences, Western University, London, ON Canada. 5. Department of Epidemiology and Biostatistics, Schulich School of Medicine & Dentistry, Western University, London, ON Canada. 6. Rush Alzheimer's Disease Center, Rush University Medical Center, Chicago, IL USA. 7. Psychosomatic Medicine Research Center, Imam Khomeini Hospital, Tehran University of Medical Sciences (TUMS), Tehran, Iran. 8. Ziaeian Hospital, Tehran University of Medical Sciences, Tehran, Iran.