1. Department of Biology University of Kentucky Lexington Kentucky USA
2. Spinal Cord and Brain Injury Research Center University of Kentucky Lexington Kentucky USA
3. Department of Neuroscience University of Kentucky Lexington Kentucky USA
4. Ambystoma Genetic Stock Center University of Kentucky Lexington Kentucky USA
5. Paul Laurence Dunbar High School Lexington Kentucky USA
6. Current Affiliation: Department of Biology University of Rochester Rochester New York USA