[1] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Coll Med, Dept Geriatr & Gerontol, Tainan 701, Taiwan
[2] Natl Cheng Kung Univ, Coll Med, Dept Nursing, Tainan 701, Taiwan
[3] Natl Cheng Kung Univ, Coll Med, Dept Family Med, Tainan 701, Taiwan
[4] Fooyin Univ, Dept Gerontol & Long Term Care Business, Kaohsiung 831, Taiwan
[5] Natl Cheng Kung Univ, Dept Med, Tainan 701, Taiwan
[6] Natl Cheng Kung Univ, Inst Gerontol, Coll Med, Tainan 701, Taiwan
[7] Natl Tainan Jr Coll Nursing, Dept Nursing, Tainan 700, Taiwan