1. Division of Gastroenterology, Department of Internal Medicine, Inha University School of Medicine, Incheon, South Korea
2. National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders (NCEED), Incheon, South Korea
3. Utah-Inha DDS & Advanced Therapeutics Research Center, Incheon, South Korea
4. Division of Gastroenterology, Department of Internal Medicine, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea