1. Molecular Imaging and Neurovascular Research Laboratory, Department of Neurology; Dongguk University Ilsan Hospital, Dongguk University College of Medicine; Goyang; Republic of Korea
2. Biomedical Research Center; Korea Institute of Science and Technology; Seoul; Republic of Korea
3. Departments of Radiology and Experimental Diagnostic Imaging; University of Texas M. D. Anderson Cancer Center; Houston; TX
4. Research Institute of Advanced Materials, Department of Materials Science and Engineering; Seoul National University; Seoul; Republic of Korea