[1] Maragheh Univ Med Sci, Sch Nursing & Midwifery, Dept Publ Hlth, Managerial Epidemiol Res Ctr, Maragheh, Iran
[2] Univ Tehran Med Sci, Sch Publ Hlth, Dept Epidemiol & Biostat, Tehran, Iran
[3] Shahid Beheshti Univ Med Sci, Sch Publ Hlth, Dept Epidemiol, Tehran, Iran