1. Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
2. Department of Basic Medical Sciences, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA
3. Center for Paralysis Research, Purdue University, West Lafayette, IN 47907, USA
4. Purdue University Interdisciplinary Life Sciences Program, Purdue University, West Lafayette, IN 47907, USA
5. Charles River Laboratories, Durham, NC 27703, USA