1. Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Laboratory Medicine, Busan Medical Center, Busan, Korea.
3. Department of Laboratory Medicine, Kosin University Gospel Hospital, Busan, Korea.
4. Department of Laboratory Medicine, Kwandong University Myongji Hospital, Kyunggi, Korea.
5. Department of Laboratory Medicine, Chonnam University Medical School, Kwangju, Korea.
6. Department of Laboratory Medicine, Dongguk University, Kyongju Hospital, Kyongju, Korea.