EGFR and non-small cell lung carcinoma: advanced (stage IIIB/IV or relapsed) non‐squamous EGFR‐mutated (ex19del, L858R, G719A, G719C, G719S, and L861Q, without T790 M) NSCLC, age 20–75 years, ECOG 0–1, newly diagnosed, chemotherapy naive, without CNS metastases