title: Comment to "The clinical importance of changes in outcome scores after treatment for chronic low back pain" by O. Hägg et.al.
authors.affiliation: Centre for Spinal Surgery, University of Zurich, 8008, Switzerland. Norbert.Boos@balgrist.ch
authors.forename: Norbert
authors.initials: N
authors.lastname: Boos
mesh_terms: D000203:Activities of Daily Living; D002908:Chronic Disease; D006801:Humans; D017116:Low Back Pain / Q000503:physiopathology* / Q000523:psychology; D010147:Pain Measurement; D011788:Quality of Life