1. Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Korea
2. School of Chemical and Biological Engineering, Seoul National University, Seoul 151-742, Korea
3. Laboratory of Cancer Genomics, Division of Cellular and Molecular Research, Humphrey Oei Institute of Cancer Research, National Cancer Center Singapore, Cancer and Stem Cell Biology Program, Duke-NUS Graduate Medical School, Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Institute of Molecular and Cell Biology, A*STAR, Biopolis Drive Proteos, Singapore 169610
4. Department of Biotechnology, The Catholic University of Korea, Bucheon-si, Gyeonggi-do 420-743, Korea