[1] Chonnam Natl Univ Hosp, Dept Internal Med, 671 Jebongno Donggu, Kwangju 501757, South Korea
[2] Inje Univ, Ilsanpaik Hosp, Goyang, South Korea
[3] Inje Univ, Paik Hosp, Pusan, South Korea
[4] Yegi Clin, Seoul, South Korea
[5] Hyoin Med Clin, Inchon, South Korea
[6] Yonsei Somang Internal Med Clin, Gympo, South Korea
[7] Serim Hosp, Bupyung, South Korea
[8] Han Ma Eum Med Ctr, Chang Won, South Korea
[9] Lee Jae Su Internal Med Clin, Chonju, South Korea
[10] Ulsan Univ Hosp, Ulsan, South Korea
[11] Hopyung Asan Med Clin, Namyangju, South Korea
[12] Yonsei Univ, Wonju Coll Med, Wonju, South Korea
[13] Yu Byeong Jeon Internal Med Clin, Kwangju, South Korea
[14] Lee Soon Hyung Internal Med Clin, Jeonju, South Korea
[15] Lee Eun Jong Internal Med Clin, Dongdu Cheon, South Korea
[16] Donggunsan Hosp, Gunsan, South Korea
[17] Hanil Hosp, Kwangju, South Korea
[18] Ulsan Univ Hosp, Ulsan, South Korea
[19] Hana Hosp, Hanmaum Med Fdn, Chonju, South Korea
[20] Yeosu Chunnam Hosp, Yeosu, South Korea
[21] Pohang SM Christian Hosp, Pohang, South Korea
[22] Gangneung Asan Hosp, Kangnung, South Korea
[23] Gachon Univ, Gil Hosp, Inchon, South Korea
[24] Soonchunhyang Univ, Chunan, South Korea