1. Department of Biomedical Laboratory Science, Eulji University College of Health Science, Seongnam, Korea
2. Research Institute of Medicine and Pharmacy, Chung-Ang University, Seoul, Korea
3. Quality Assurance Division, Hanmaum Blood Center, Gwacheon, Korea
4. Department of Laboratory Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
5. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea