1. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Laboratory Medicine, Ewha Womans University Mokdong Hospital, Seoul, Korea.
3. Department of Laboratory Medicine, Yeungnam University Hospital, Daegu, Korea.
4. Department of Laboratory Medicine, Konyang University Hospital, Daejeon, Korea.
5. Department of Laboratory Medicine, Gyeongsang National University Hospital, Jinju, Korea.
6. Department of Laboratory Medicine, Inha University Hospital, Incheon, Korea.