1. Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
2. Department of Health Sciences and Technology, SAIHST, Sungkyunkwan University, Seoul, Republic of Korea
3. Department of Mathematics, Ajou University, Suwon, Republic of Korea
4. Division of Gastroenterology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea