1. Department of Microbiology and Immunology, Eulji University School of Medicine, Daejeon, South Korea
2. BK21 Plus Program, Department of Senior Healthcare, Graduate School, Eulji University, Daejeon, South Korea
3. Department of Biomedical Laboratory Science, College of Health Sciences, Eulji University, Gyeonggi-Do, Seongnam, South Korea
4. Department of Urology, Eulji University School of Medicine, Daejeon, South Korea
5. Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA