1. Department of Microbiology, College of Medicine; Konkuk University; Seoul 143-701 Republic of Korea
2. Institute of Biomedical Science and Technology; Konkuk University; Seoul 143-701 Republic of Korea
3. Department of Clinical Pathology; Gwangju Health College; Gwangju 506-701 Republic of Korea
4. Department of Microbiology; Cheju National University College of Medicine; Jeju 690-756 Republic of Korea