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机译: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)
Univ Naples Federico II, Dept Publ Hlth, Orthopaed Sect, Via S Pansini 5, I-80131 Naples, Italy;
Natl Canc Inst G Pascale Fdn, IRCCS, Div Skeletal Muscle Oncol Surg, Naples, Italy;