1. Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634, United States
2. Center for Optical Materials Science and Engineering Technologies, Clemson University, Anderson, South Carolina 29625, United States
3. Department of Chemistry, Clemson University, Clemson, South Carolina 29634, United States
4. Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
5. Department of Vision Science, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
6. Department of Neurobiology, Evelyn F. McKnight Brain Institute & Civitan International Research Center, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
7. Department of Radiology, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
8. Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States