[1] Univ Ulsan, Coll Med, Ulsan Univ Hosp, Dept Internal Med, Ulsan, South Korea
[2] Keimyung Univ, Dongsan Med Ctr, Dept Internal Med, Daegu, South Korea
[3] Chonnam Natl Univ Hosp, Dept Internal Med, Gwangju, South Korea
[4] Korea Univ, Guro Hosp, Dept Internal Med, Seoul, South Korea
[5] Kyunghee Univ Hosp, Dept Internal Med, Seoul, South Korea
[6] Chungbuk Natl Univ Hosp, Dept Internal Med, Cheongju, South Korea
[7] Seoul Natl Univ Hosp, Dept Internal Med, Seoul, South Korea
[8] Kyungpook Natl Univ Hosp, Dept Internal Med, Daegu, South Korea
[9] Daegu Catholic Univ Hosp, Dept Internal Med, Daegu, South Korea
[10] Yeungnam Univ Hosp, Dept Internal Med, Daegu, South Korea
[11] Univ New South Wales, Dept Internal Med, Sydney, NSW, Australia