[1] Univ Tehran Med Sci, Sch Nursing & Midwifery, Dept Med Surg Nursing, Nosrat St,Tohid Sq, Tehran 1419733171, Iran
[2] Univ Tehran Med Sci, Sch Nursing & Midwifery, USERN Care TUMS Off, Tehran, Iran
[3] Univ Tehran Med Sci, Imam Khomeini Hosp, Sch Med, Dept Cardiol, Tehran, Iran
[4] Birjand Univ Med Sci, Cardiovasc Dis Res Ctr, Sch Med, Tehran, Iran
[5] Univ Alabama Birmingham, Sch Nursing, Div Gerontol Geriatr & Palliat Care, Birmingham, AL USA
[6] Univ Alabama Birmingham, Dept Med, Div Gerontol Geriatr & Palliat Care, Birmingham, AL USA
[7] Univ Alabama Birmingham UAB, Sch Nursing, Birmingham, AL USA
[8] UAB Ctr Palliat & Support Care, Birmingham, AL USA
[9] Univ Alabama Birmingham, Sch Nursing, Birmingham, AL USA