1. Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine, Incheon, Korea.
2. Digestive Disease Center, Department of Internal Medicine, Inha University School of Medicine and the National Center of Efficacy Evaluation for the Development of Health Products Targeting Digestive Disorders (NCEED), Incheon, Korea.
3. Department of Pathology, Inha University School of Medicine, Incheon, Korea.
4. Digestive Disease Center, 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, Korea.