1. International Vaccine Institute, Seoul 151-600, Republic of Korea
2. Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejon 305-701, Republic of Korea
3. School of Biotechnology and Institute of Life Science and Resources, Kyung Hee University, Suwon 449-701, Republic of Korea
4. RNA Inc., Suwon 449-701, Republic of Korea