Validation of a prognostic model including the number of harvested lymph-nodes in the setting of non-small cell lung cancer patients undergoing curative resection: a multicenter analysis. - Chiappetta M; Leuzzi G; Sperduti I; Bria E; Mucilli F; Ratto GB; Lococo F; Filosso PL; Spaggiari L; Facciolo F (Minerva surgery, 2022)