782-C Regulatory T-cell tumor infiltration is associated to better outcome in advanced NSCLC patients under ≥2nd line anti-PD1/L1 monotherapy in the PIONeeR project - Lilian Laborde; Julien Mazières; Fabrice Barlesi; Jacques Fieschi; Maurice Pérol; Vanina Leca; Alboukadel Kassambara; Florence Monville; Maryannick Le Ray; Marie Roumieux; Richard Malkoun; Arnaud Boyer; et al. (Journal for ImmunoTherapy of Cancer, 2023)