[1] Univ Ulsan, Coll Med, Asan Med Ctr, Hlth Screening & Promot Ctr, Seoul, South Korea
[2] Natl Med Ctr, Dept Internal Med, Seoul, South Korea
[3] Wonkwang Univ, Coll Med, Dept Internal Med, Iksan, South Korea
[4] Digest Dis Res Inst, Iksan, South Korea
[5] Chung Ang Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[6] Keimyung Univ, Sch Med, Dept Internal Med, Daegu, South Korea
[7] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Dept Med, 81 Irwon Ro, Seoul 06351, South Korea
[8] Seoul Natl Univ, Coll Med, Dept Internal Med, Seoul, South Korea
[9] Seoul Natl Univ, Coll Med, Liver Res Inst, Seoul, South Korea