1. Huaxi
MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China
2. State
Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug
Discovery for Metabolic Diseases, Center of Advanced Pharmaceuticals
and Biomaterials, China Pharmaceutical University, Nanjing 210009, China
3. National
Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
4. Department
of Radiology, Wayne State University, Detroit, Michigan 48201, United States
5. College of
Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China