1. Department of Clinical Pathology, College of Medicine, Inha University Hospital, 7-206, 3-ga, Shinheung-dong, Jung-gu, Inchon 400-103, Korea
2. Deparment of Obstetrics, College of Medicine, Inha University Hospital, 7-206, 3-ga, Shinheung-dong, Jung-gu, Inchon 400-103, Korea