cN + patients with low GDF@ expression benefitted from induction TPF in overall survival ( P = @ , HR = @ ) and DMFS ( P = @ , HR = @ ) , cN - patients with high GDF@ expression benefitted from induction TPF in overall survival ( P = @ , HR = @ ) , disease-free survival ( P = @ , HR = @ ) , locoregional recurrence-free survival ( P = @ , HR = @ ) and DMFS ( P = @ , HR = @ ) .