title: [Combined preoperative 60Co radiation and surgery for middle-third esophageal carcinoma--an analysis of 323 cases].
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use*; D003131:Combined Modality Therapy; D004938:Esophageal Neoplasms / Q000532:radiotherapy* / Q000601:surgery; D006801:Humans; D011379:Prognosis; D013997:Time Factors
chemical_list: D003037:Cobalt Radioisotopes