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Kaplan–Meier curves for disease-free survival in patients submitted to resection of non-pancreatic periampullary adenocarcinoma (NPPC) with (dotted line) and without (black line) intra-arterial chemotherapy and concomitant radiotherapy (IAC/RT) (19 months versus 8 months; log-rank test, P = 0.103; hazard ratio for recurrent disease 0.48, 95% confidence interval 0.25–0.90; P = 0.022)
