[Esophageal cancer. 2e. Radiotherapy].
D003036:Cobalt Isotopes / Q000627:therapeutic use*; D004938:Esophageal Neoplasms / Q000532:radiotherapy*; D006801:Humans; D008722:Methods; D011882:Radiotherapy, High-Energy; D011883:Radium / Q000627:therapeutic use*
D003036:Cobalt Isotopes; D011883:Radium