title: To the Editor.
authors.affiliation: Departamento Científico Fundación Kovacs Palma de Mallorca, Spain Hospital de la Santa Creu i Sant Pau (UAB) Barcelona, Spain Servicio de Radiología Fundación Instituto Valenciano de Oncología Valencia, Spain Fundacion Jimenez Diaz Madrid, Spain Departamento Científico Fundación Kovacs Palma de Mallorca, Spain.
authors.forename: Francisco M
authors.initials: FM
authors.lastname: Kovacs
authors.forename: Gerard
authors.initials: G
authors.lastname: Urrútia
authors.forename: Estanislao
authors.initials: E
authors.lastname: Arana
authors.forename: Luis
authors.initials: L
authors.lastname: Álvarez-Galovich
authors.forename: Javier
authors.initials: J
authors.lastname: Olabe
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