[1] Univ Social Welf & Rehabil Sci, Dept Gerontol, Tehran, Iran
[2] Golestan Univ Med Sci, Dept Surg Technol, Paramed Sch, Gorgan, Golestan, Iran
[3] Univ Tehran Med Sci, Med Sch, Dept Clin Gerontol & Geriatr, Tehran, Iran
[4] Golestan Univ Med Sci, Dept Biostat & Epidemiol, Hlth Management & Social Dev Res Ctr, Gorgan, Golestan, Iran
[5] Univ Tehran Med Sci, Elderly Hlth Res Ctr, Endocrinol & Metab Populat Sci Inst, Tehran, Iran
[6] Univ Social Welf & Rehabil Sci, Iranian Res Ctr Aging, Tehran, Iran
[7] Univ Tehran Med Sci, Dept Geriatr, Med Sch, Ziaiyan Hosp, Tehran, Iran