1 | Sabzevar university of medical sciences, Sabzevar, Iran |
2 | Iranian Research Center on Healthy Aging, Sabzevar University of Medical Sciences, Sabzevar, Iran |
3 | General Dentist, Sabzevar university of medical sciences, Sabzevar, Iran |
4 | Department of Health and Community Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran |