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, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
4. Department
of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
5. Key Laboratory of Polymer Ecomaterials,
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
6. Department of
Textile Engineering, Chemistry and Science, North Carolina State University, Raleigh, North Carolina 27695, United States
7. Department
of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States