1. Department of Ophthalmology & Vision Science, Department of Dermatology, Institute for Regenerative Cures, University of California Davis, Sacramento, California, USA.
2. Department of Ophthalmology, University of California Davis, School of Medicine, Sacramento, California, USA.
3. Department of Biomedical Engineering, University of California Davis, Davis, California, USA.
4. Center for Paralysis Research, Department of Basic Medical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
5. Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana, USA.