1. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics and National Institute of Diagnostics and Vaccine Development in Infectious DiseaseSchool of Public HealthXiamen University Xiamen 361102 China
2. State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics and Center for Molecular Imaging and Translational MedicineSchool of Public HealthXiamen University Xiamen 361102 China
3. Laboratory of Molecular Imaging and NanomedicineNational Institute of Biomedical Imaging and BioengineeringNational Institutes of Health Bethesda MD 20892 USA