1. Department of Laboratory Medicine and Research Institute of Bacterial Resistance, Yonsei University College of Medicine, Seoul, Korea.
2. Department of Laboratory Medicine, Soonchunhyang University Bucheon Hospital, Bucheon, Korea.
3. Samkwang Medical Laboratories, Seoul, Korea.
4. Department of Laboratory Medicine, Wonkwang University Hospital, Iksan, Korea.
5. Department of Laboratory Medicine, Ajou University Hospital, Suwon, Korea.
6. Department of Laboratory Medicine, Dongguk University Gyeongju Hospital, Gyeongju, Korea.
7. Department of Laboratory Medicine, Hanyang University College of Medicine, Seoul, Korea.