[1] Gachon Univ, Gil Med Ctr, Dept Internal Med, Coll Med, Incheon, South Korea
[2] Seoul Natl Univ Hosp, Dept Internal Med, Seoul, South Korea
[3] Pusan Natl Univ, Dept Internal Med, Pusan Natl Univ Hosp, Sch Med, Busan, South Korea
[4] Pusan Natl Univ, Pusan Natl Univ Hosp, Biomed Res Inst, Sch Med, Pusan, South Korea
[5] Ewha Womans Univ, Div Commun & Media, Seoul, South Korea
[6] Univ Ulsan, Coll Med, Dept Prevent Med, Seoul, South Korea
[7] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, Seongnam, South Korea
[8] Seoul Natl Univ, Bundang Hosp, Dept Internal Med, 82 Gumi ro 173beon gil, Seongnam 13620, South Korea