1. Department of Laboratory Medicine , Konkuk University School of Medicine , Seoul , Korea
2. Division of Maternal and Fetal Medicine, Department of Obstetrics and Gynecology, School of Medicine , Research Institute of Medical Science, Konkuk University , Seoul , Korea
3. Department of Laboratory Medicine , Seoul National University Bundang Hospital , Seongnam , Korea
4. LabGenomics Clinical Laboratories , Seongnam , Korea