1. Department of Biochemistry and Cell Biology, Cell and Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 700-422, Republic of Korea
2. Graduate School of Medical Science and Engineering, Biomedical Research Center, KAIST Institute for the BioCentury, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea
3. Division of High-Risk Pathogen Research, Korea National Institute of Health (KNIH), Korea Centers for Disease Control & Prevention (KCDC), Osong, Chungbuk 363-951, Republic of Korea
4. Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea