1. School of Public Health; Arak University of Medical Sciences; Arak Iran
2. Department of Epidemiology and Biostatistics; School of Public Health; Tehran University of Medical Sciences; Tehran Iran
3. Knowledge Utilization Research Center; Tehran University of Medical Sciences; Tehran Iran
4. Department of Epidemiology and Biostatistics; School of Public Health; Kermanshah University of Medical Science; Kermanshah Iran
5. Memory and Behavioral Neurology Department; Roozbeh Hospital; Tehran University of Medical Sciences; Tehran Iran