1. Department of Internal Medicine, Inha University School of Medicine, Incheon, South Korea.
2. Department of Internal Medicine, Ajou University School of Medicine, Suwon, South Korea
3. Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Bucheon Hospital, Bucheon, South Korea
4. Department of Internal Medicine, Soon Chun Hyang University School of Medicine, Cheonan Hospital, Cheonan, South Korea
5. Department of Internal Medicine, Catholic University of Daegu School of Medicine, Daegu, South Korea
6. Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
7. Department of Radiology, Inha University School of Medicine, Incheon, South Korea
8. Department of Internal Medicine, Inha University School of Medicine, the National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders (NCEED), and Utah-Inha DDS & Advanced Therapeutics Research Center, Incheon, South Korea