“…Department of Obstetrics and Gynecology, Kyungpook National University Hospital, Chungku, Taegu, South Korea 2. To whom correspondence should be addressed at Department of Obstetrics and Gynecology, Kyungpook National University Hospital, 50, Samdukdong-2-Ga, Chungku, Taegu 700-721, South Korea; e-mail: sschun@knu.ac.kr…”