1. Laboratory of Molecular Imaging
and Nanomedicine (LOMIN), National Institute of Biomedical Imaging
and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
2. Key laboratory of Molecular
Enzymology and Enzyme Engineering, Ministry of Education, Jilin University, Changchun 130023, P.R. China
3. Biomedical Research Center, Korea Institute of Science and Technology, Seoul 136-791,
Korea