title: [Early assessments of results in sequential clinical trials of cancer treatment (author's transl)].
mesh_terms: D002986:Clinical Trials as Topic; D004938:Esophageal Neoplasms / Q000401:mortality* / Q000532:radiotherapy; D006801:Humans; D008175:Lung Neoplasms / Q000401:mortality* / Q000532:radiotherapy; D013223:Statistics as Topic