1. School
of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457
2. Center
for Molecular Imaging and Nuclear Medicine, School for Radiological
and Interdisciplinary Sciences (RAD-X), Soochow University, Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Suzhou 215123, P. R. China
3. Department
of Radiology, The People’s Liberation Army General Hospital, No. 28 Fuxing Road, Beijing 100853, China