1. Joint
Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina 27695, United States
2. Division
of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery,
UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. State
Key Laboratory of Natural Medicines and Jiangsu Key Laboratory of
Drug Discovery for Metabolic Diseases, Center of Drug Discovery, China Pharmaceutical University, Nanjing 210009, China