1. Center for Brain Injury & Repair, Department of Neurosurgery, Perelman School of Medicine University of Pennsylvania Philadelphia Pennsylvania USA
2. Center for Neurotrauma, Neurodegeneration & Restoration Corporal Michael J. Crescenz Veterans Affairs Medical Center Philadelphia Pennsylvania USA
3. Department of Bioengineering, School of Engineering and Applied Science University of Pennsylvania Philadelphia Pennsylvania USA
4. New Jersey Center for Biomaterials Rutgers University New Brunswick New Jersey USA
5. Dartmouth‐Hitchcock Medical Center, Division of Plastic Surgery Dartmouth College Lebanon New Hampshire USA