1. Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul 130-701, Republic of Korea
2. Biomedical Research Institute, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea
3. Department of Polymer Science and Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea
4. Cell & Matrix Research Institute, School of Medicine, Kyungpook National University, Daegu 700-422, Republic of Korea