title: In response.
authors.affiliation: Rush University Medical Center Chicago, IL Rush University Medical Center Chicago, IL Spine Care Medical Group, San Francisco, CA Spine Colorado, Durango, CO.
authors.forename: Frank M
authors.initials: FM
authors.lastname: Phillips
authors.forename: Gunnar
authors.initials: G
authors.lastname: Andersson
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Slosar
authors.forename: Jim A
authors.initials: JA
authors.lastname: Youssef
mesh_terms: D059350:Chronic Pain / Q000601:surgery*; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery*; D017116:Low Back Pain / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000601:surgery*; D013123:Spinal Fusion