Institute of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University Health System, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemungu, Seoul 03722, Korea
Dr. Sang Kil Lee
Institute of Gastroenterology, Department of Internal Medicine, Severance Hospital, Yonsei University Health System, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemungu, Seoul 03722, Korea