title: Response.
authors.forename: Wei
authors.initials: W
authors.lastname: Guo
mesh_terms: D002813:Chondrosarcoma / Q000601:surgery*; D002817:Chordoma / Q000601:surgery*; D005260:Female; D006801:Humans; D008297:Male; D009364:Neoplasm Recurrence, Local / Q000601:surgery*; D019635:Neurosurgical Procedures; D012447:Sacrum / Q000601:surgery*; D013125:Spinal Neoplasms / Q000601:surgery*