1 Division of Gastroenterology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro Ilsan-donggu, Goyang-si, Goyang, 10444, Korea.
2 Department of Radiology, National Health Insurance Service Ilsan Hospital, Goyang, Korea.
3 Department of Human Biology, University of Toronto, Toronto, ON, Canada.
4 Department of Biological Sciences and Research Center of Ecomimetics, Chonnam National University, Gwangju, Korea. eungsam.kim@chonnam.ac.kr.
5 Division of Gastroenterology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro Ilsan-donggu, Goyang-si, Goyang, 10444, Korea. fortune22c@nhimc.or.kr.