1. Mild Traumatic Brain Injury Committee, National Football League, New York, New York, ProHEALTH Care Associates, LLP, Lake Success, New York
2. Mild Traumatic Brain Injury Committee, National Football League, New York, New York, ProBiomechanics, LLC, Bloomfield Hills, Michigan
3. Biokinetics and Associates, Ltd., Ottawa, Ontario, Canada
4. Sport Biomechanics Laboratory, Bioengineering Center, Wayne State University, Detroit, Michigan
5. National Operating Committee on Standards for Athletic Equipment, Overland Park, Kansas, University of Tennessee, College of Engineering, Sports Biomechanics, Impact Research Lab, Knoxville, Tennessee