1. Department of Bio-Information Science, Ewha Womans University, Seoul 03760, Republic of Korea
2. Korean Bioinformation Center, Korean Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
3. Department of Computer Science and Engineering, Korea University, Seoul 02841, Republic of Korea
4. Department of Life Science, Ewha Womans University, Seoul 03760, Republic of Korea