1. National Engineering Research Center for Nanomedicine; College of Life Science and Technology; Huazhong University of Science and Technology; Wuhan 430074 P. R. China
2. Department of Pharmaceutical Chemistry; College of Pharmacy; Misr University for Science and Technology; Al-Motamayez District 6th of October City P.O. Box: 77 Egypt
3. Molecular Imaging Program at Stanford (MIPS); Canary Center at Stanford for Cancer Early Detection; Department of Radiology and Bio-X Program; School of Medicine; Stanford University Stanford; California USA