[1
]
*Department of Internal Medicine, Institute of Gastroenterology, Yonsei University
College of Medicine, Seoul, Republic of Korea; †Department of Internal Medicine, University
of Ulsan College of Medicine, Seoul, Republic of Korea; ‡Department of Internal Medicine,
Inje University College of Medicine, Seoul, Republic of Korea; §Department of Internal
Medicine, Hanyang University College of Medicine, Seoul, Republic of Korea; ‖Department
of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic
of Korea; ¶Department of Internal Medicine, Sungkyunkwan University School of Medicine,
Seoul, Republic of Korea; and **Department of Internal Medicine, Soonchunhyang University
School of Medicine, Seoul, Republic of Korea.