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 College of Medicine, Cheonan, Korea
3. Department of Laboratory Medicine, College of Medicine, Yeungnam University College of Medicine, Daegu, Korea
4. Department of Laboratory Medicine, Chosun University College of Medicine, Gwangju, Korea