[1] Neyshabur Univ Med Sci, Hlth Ageing Res Ctr, Dept Epidemiol & Stat, Neyshabur 9329774448, Iran
[2] Neyshabur Univ Med Sci, Hlth Ageing Res Ctr, Dept Basic Med Sci, Neyshabur, Iran
[3] Neyshabur Univ Med Sci, Noncommunicable Dis Res Ctr, Dept Basic Med Sci, Neyshabur, Iran
[4] Univ Tehran Med Sci, Liver & Pancreatobiliary Dis Res Ctr, Digest Dis Res Inst, Tehran, Iran
[5] Iran Univ Med Sci, Res Inst Hazrat & Rasool Gen Hosp, Res Ctr Prevent Cardiovasc Endocrinol & Metab, Dept Cardiol, Tehran, Iran
[6] Tabriz Univ Med Sci, TB & Lung Dis Res Ctr, Dept Internal Med, Tabriz, Iran
[7] Tabriz Univ Med Sci, Connect Tissue Dis Res Ctr, Dept Internal Med, Tabriz, Iran
[8] Shiraz Univ Med Sci, Shiraz Geriatr Res Ctr, Dept Psychiat, Shiraz, Iran
[9] Neyshabur Univ Med Sci, Longitudinal Study Ageing Ctr, Neyshabur, Iran
[10] Neyshabur Univ Med Sci, Hlth Ageing Res Ctr, Dept Cardiol, Neyshabur, Iran
[11] Swansea Univ, Coll Human & Hlth Sci, Ctr Innovat Ageing, Swansea, W Glam, Wales
[12] Trinity Coll Dublin, Dept Med Gerontol, Dublin, Ireland
[13] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[14] Massey Univ, Sch Psychol, Palmerston North, New Zealand
[15] Univ Tehran Med Sci, Digest Dis Res Ctr, Digest Dis Res Inst, Tehran, Iran