1. Division of Gastroenterology, Department of Internal Medicine, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
2. Department of Dermatology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.
3. Department of Pathology, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea.