[1] Chang Gung Mem Hosp, Dept Internal Med, Div Geriatr & Gen Internal Med, Taoyuan, Taiwan
[2] Chang Gung Univ, Coll Med, Sch Med, Taoyuan, Taiwan
[3] Taipei Med Univ, Coll Nursing, Sch Gerontol & Long Term Care, Taipei, Taiwan
[4] Karolinska Inst, Dept Global Publ Hlth, Stockholm, Sweden
[5] Taipei Med Univ, Coll Nursing, Int PhD Program Gerontol & Long Term Care, Taipei, Taiwan