1. Department of Internal Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
2. Department of Microbiology, Yonsei University College of Medicine, Seoul, Korea.
3. Brain Korea 21 PLUS for Medical Science, Yonsei University College of Medicine, Seoul, Korea.
4. Severance Biomedical Science Institute and Institute for Immunology and Immunological Diseases, Yonsei University College of Medicine, Seoul, Korea.
5. Department of Pathology, University of Alabama at Birmingham, Birmingham, AL, USA.
6. Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA.