1. Henry Ford Health System West Bloomfield MI
2. Department of Physical Medicine and RehabilitationUniversity of Pittsburgh Medical Center Pittsburgh PA
3. Department of Anesthesiology and Perioperative MedicineUniversity of Pittsburgh Medical Center Pittsburgh PA
4. Health Services DivisionUniversity of Pittsburgh Medical Center Pittsburgh PA
5. Department of Orthopaedic SurgeryUniversity of Pittsburgh Medical Center Pittsburgh PA
6. Ferguson Laboratory for Orthopaedic and Spine ResearchUPMC Rehabilitation Institute Pittsburgh PA