title: Answer to the Letter to the Editor of J. Li et al. concerning "Surgical treatment of sacral chordoma: survival and prognostic factors" by C. Ruosi et al. (Eur Spine J; 2015; 24(Suppl 7):S912-S917).
authors.affiliation: Orthopaedic Section, Public Health Department, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy. caruosi@unina.it.
authors.forename: C
authors.initials: C
authors.lastname: Ruosi
authors.affiliation: Orthopaedic Section, Public Health Department, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Colella
authors.affiliation: Orthopaedic Section, Public Health Department, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy.
authors.forename: S L
authors.initials: SL
authors.lastname: Di Donato
authors.affiliation: Orthopaedic Section, Public Health Department, University of Naples "Federico II", Via S. Pansini 5, 80131, Naples, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Granata
authors.affiliation: Division of Skeletal Muscle Oncology Surgery, National Cancer Institute G. Pascale Foundation, IRCCS, Naples, Italy.
authors.forename: M G
authors.initials: MG
authors.lastname: Di Salvatore
authors.affiliation: Division of Skeletal Muscle Oncology Surgery, National Cancer Institute G. Pascale Foundation, IRCCS, Naples, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Fazioli
mesh_terms: D002817:Chordoma; D006801:Humans; D011379:Prognosis; D013123:Spinal Fusion