Affiliation: | a Department of Internal Medicine, Seoul National University College of Medicine and Boramae Medical Center, Seoul, Republic of Korea b Department of Preventive Medicine, Chonbuk National University Medical School, Jeonju, Republic of Korea c Department of Internal Medicine, Dongguk University Ilsan Hospital, Goyang, Republic of Korea d Department of Internal Medicine, Inje University College of Medicine, Busan, Republic of Korea e Department of Internal Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea f Department of Internal Medicine, Wonkwang University College of Medicine, Iksan, Republic of Korea g Department of Internal Medicine, Chonbuk National University Medical School and Research Institute of Clinical Medicine, Jeonju, Republic of Korea |