1. Department of Physical Medicine & Rehabilitation, Mayo Clinic, Rochester, MN, USA
2. Minnesota Combative Sports Commission, St. Paul, MN, USA
3. Mario Roberto Jiu-Jitsu Academy, Rochester, MN, USA
4. Departments of Physical Medicine & Rehabilitation, Mayo Clinic Sports Medicine Centre, Mayo Clinic, Minneapolis, MN, USA
5. Department of Neurology, and Health Science Research, Mayo Clinic, Rochester, MN, USA