[1] Tabriz Univ Med Sci, Fac Hlth, Dept Geriatr Hlth, Tabriz, Iran
[2] Tabriz Univ Med Sci, Publ Hlth Ctr, Tabriz, Iran
[3] Tabriz Univ Med Sci, Tabriz Hlth Serv Management Res Ctr, Sch Management & Med Informat, Dept Hlth Policy& Management, Tabriz, Iran
[4] Iran Univ Med Sci, Psychosocial Hlth Res Inst, Prevent Med & Publ Hlth Res Ctr, Tehran, Iran
[5] Iran Univ Med Sci, Hlth Management Res Inst, Hlth Management & Econ Res Ctr, Tehran, Iran
[6] London Sch Hyg & Trop Med, Dept Infect Dis Epidemiol, London, England
[7] Minist Hlth & Med Educ, Supreme Council Hlth & Food Secur, Tehran, Iran
[8] Tabriz Univ Med Sci, Hlth Management & Safety Promot Res Inst, Social Determinants Hlth Res Ctr, Tabriz, Iran