1. American Hip Institute, Chicago, IL 60018, USA
2. American Hip Institute Research Foundation, Chicago, IL 60018, USA
3. AMITA Health St. Alexius Medical Center, Hoffman Estates, IL 60169, USA
4. Vanderbilt Medical School, Nashville, TN, 37232, USA
5. Department of Orthopedic Surgery, Mayo Clinic, Phoenix, AZ, 85054, USA
6. Department of Orthopedic Surgery, Mayo Clinic, Rochester, MN 55905, USA