1 Washington State University, Elson S. Floyd College of Medicine, Spokane, WA. Michael.g.johnston@wsu.edu.
2 Washington State University, Elson S. Floyd College of Medicine, Spokane, WA.
3 Spokane Joint Replacement Center/ Orthopaedic Specialty Clinic of Spokane, Spokane, WA, USA.
4 Washington State University, Elson S. Floyd College of Medicine, Spokane, WA; Spokane Joint Replacement Center/ Orthopaedic Specialty Clinic of Spokane, Spokane, WA, USA.