1. Division of Gastroenterology; Department of Internal Medicine; College of Medicine; The Catholic University of Korea; Seoul Korea
2. Catholic Photomedicine Research Institute; Seoul Korea
3. Department of Dermatology; College of Medicine; The Catholic University of Korea; Seoul Korea
4. Department of Obstetrics and Gynecology; College of Medicine; The Catholic University of Korea; Seoul Korea
5. Division of Gastroenterology; Department of Internal Medicine; Ewha Womans University School of Medicine; Seoul Korea