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)
Eur Spine J. 2017 Jan;26(1):283-284.
doi: 10.1007/s00586-016-4824-6.
Epub 2016 Oct 20.