TREATMENT OF ESOPHAGEAL CANCER WITH COBALT-60.
D003035:Cobalt; D003036:Cobalt Isotopes; D004938:Esophageal Neoplasms; D006664:History; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011379:Prognosis; D011879:Radiotherapy Dosage; D011882:Radiotherapy, High-Energy
D003036:Cobalt Isotopes; D003035:Cobalt
COBALT ISOTOPES; ESOPHAGEAL NEOPLASMS; HISTORY; HISTORY OF MEDICINE, 20TH CENT.; NEOPLASM RADIOTHERAPY; PROGNOSIS; RADIOTHERAPY DOSAGE; RADIOTHERAPY, HIGH ENERGY