[1] Seoul Natl Univ Hosp, Dept Internal Med, Seoul, South Korea
[2] Seoul Natl Univ, Coll Med & Hosp, Ctr Hlth Promot & Optimal Aging, Dept Family Med, Seoul, South Korea
[3] Hallym Univ, Coll Med, Chuncheon Sacred Heart Hosp, Dept Family Med, Chunchon, South Korea
[4] Korea Univ, Guro Hosp, Dept Internal Med, Div Endocrinol & Metab, Seoul, South Korea
[5] Jeju Natl Univ, Dept Family Med, Sch Med, Jeju, South Korea
[6] Chonnam Natl Univ, Med Sch, Dept Phys & Rehabil Med, Gwangju, South Korea
[7] Gyeongsang Natl Univ, Coll Med, Dept Psychiat, Jinju, South Korea
[8] Kyung Hee Univ, East West Med Res Inst, Coll Med, Dept Biomed Sci & Technol, Seoul, South Korea
[9] Kyung Hee Univ, Coll Med, Dept Family Med, Elderly Frailty Res Ctr, Kyungheedaero 23, Seoul 02447, South Korea
[10] Seoul Natl Univ, Coll Med, Bundang Hosp, Dept Internal Med, 82,Gumi Ro 173beon Gil, Seongnam 13620, Gyeonggi Do, South Korea