1. Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Yonsei University College of Medicine, Severance Fecal Microbiota Transplantation Center, Severance Hospital, Seoul, Korea.
2. Department of Medicine, Yonsei University College of Medicine, Seoul, Korea.
3. Department of Microbiology and Immunology, Brain Korea 21 Project for Medical Sciences, Yonsei University College of Medicine, Seoul, Korea.
4. Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea.