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| Methods | RCT ‐ 1983‐87 | |
| Participants | 49 patients | |
| Interventions | surgery + radiotherapy vs surgery + radiotherapy + chemotherapy cisplatin 80 tegafur* 600‐800 | |
| Outcomes | survival | |
| Notes | cisplatin given once tegafur daily treatment radiotherapy 40 Gy in 20 fractions complete resection | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Allocation concealment (selection bias) | Low risk | A ‐ Adequate |
