1. Department of Pathology, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Pathology, Soonchunhyang University, Seoul, Korea.
3. Department of Obstetrics and Gynecology, Institute of Women’s Life Medical Science, Yonsei University College of Medicine, Seoul, Korea.
4. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.