Metastatic non-small cell lung cancer: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-up. (30th January 2019) - Planchard, D; Popat, S; Kerr, K; Novello, S; Smit, E F; Faivre-Finn, C; Mok, T S; Reck, M; Van Schil, P E; Hellmann, M D; Peters, S