Tae-Hee Kim1, Eun-Ae Jung2, Hae-Hyeog Lee1, Sun-Yong Hwang3. 1. Department of Obstetrics and Gynecology, Soonchunhyang University College of Medicine, Bucheon, Korea. 2. Medical Library, Soonchunhyang University Bucheon Hospital, Bucheon, Korea. 3. Department of Interdisciplinary Program in Biomedical Science, Soonchunhyang University, Asan, Korea.