1. Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pediatric Gastroenterology, Hepatology and Nutrition, Severance Pediatric IBD Research Group, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea.
3. Dr.Yu’s Pediatric and Adolescence Medicine, Osan, Korea.