1. Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering National Institutes of Health, Bethesda, Maryland, USA
2. Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology Zhongda Hospital, Nanjing, People's Republic of China
3. Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research National Institutes of Health, Bethesda, Maryland, USA
4. School of Life Science and Technology Xidian University, Xi'an, Shaanxi, People's Republic of China