title: Response to: "Is it ethical Not to conduct a prospectively controlled trial of adjuvant chemotherapy in osteosarcoma?
mesh_terms: D002648:Child; D002986:Clinical Trials as Topic; D035061:Control Groups; D004992:Ethics, Medical; D006801:Humans; D012516:Osteosarcoma / Q000188:drug therapy* / Q000601:surgery; D011446:Prospective Studies