1. Department of Molecular
Science and Technology, Ajou University, 5 Woncheon, Yeongtong, Suwon 443-749, Republic of Korea
2. Division of Bioengineering, College of Life Sciences
and Bioengineering, Incheon National University, Incheon 22012, Republic of Korea
3. Department of Medical Engineering, Yonsei University College of Medicine, Seoul 120-752, Republic of Korea