1. Dept. of Medical Science, Soonchunhyang University, Asan, Chungnam 31538, South Korea
2. Dept. of Computer Engineering, Chungbuk National University, Cheongju, Chungbuk 28644, South Korea
3. Dept. of Chemistry, Ajou University, Suwon, Gyeonggi 16499, South Korea
4. Dept. of Pharmaceutical Engineering, Soonchunhyang University, Asan, Chungnam 31538, South Korea