[1] Natl Cheng Kung Univ, Inst Gerontol, Coll Med, Tainan, Taiwan
[2] Natl Cheng Kung Univ, Inst Allied Hlth Sci, Coll Med, Tainan, Taiwan
[3] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Dept Family Med, Coll Med, Tainan, Taiwan
[4] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Dept Neurol, Coll Med, Tainan, Taiwan
[5] Natl Cheng Kung Univ, Natl Cheng Kung Univ Hosp, Dept Orthoped, Coll Med, Tainan, Taiwan
[6] Chang Gung Univ, Chang Gung Mem Hosp, Div Endocrinol & Metab, Dept Internal Med, Taoyuan, Taiwan