title: Section I: Setting the stage.
authors.forename: Allston J
authors.initials: AJ
authors.lastname: Stubbs
authors.forename: Martha L
authors.initials: ML
authors.lastname: Gray
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Pearle
mesh_terms: D006615:Hip / Q000601:surgery; D006801:Humans; D007717:Knee / Q000601:surgery; D019637:Orthopedic Procedures; D015207:Osteoarthritis, Hip / Q000601:surgery; D020370:Osteoarthritis, Knee / Q000601:surgery; D013238:Stereotaxic Techniques; D025321:Surgery, Computer-Assisted