1. Department of Life Science, School of Natural Sciences, Hanyang University, Seoul 04763, Korea
2. BK21 PLUS Life Science for BDR Team, Hanyang University, Seoul 04763, Korea
3. Research Institute for Natural Sciences, Hanyang University, Seoul 04763, Korea
4. Present address: Doctor of Dental Surgery Program, University of the Pacific, Arthur A. Dugoni School of Dentistry, San Francisco, CA 94103, USA
5. Present address: Macrogen Inc., Seoul 08511, Korea