Osimertinib Recruiting Phase 1 Trials for Stage IIIB Non-Small Cell Lung Cancer AJCC v7 / EGFR NP_005219.2:p.L858R / Stage IIIA Non-Small Cell Lung Cancer AJCC v7 / EGFR NP_005219.2:p.G719X / Stage IIIB Lung Non-Small Cell Cancer AJCC v7 / Stage IV Non-Small Cell Lung Cancer AJCC v7 / Stage IIIb Non-small Cell Lung Cancer / EGFR NP_005219.2:p.L861Q / Recurrent Non-Small Cell Lung Carcinoma / Stage IV Non-Small Cell Lung Cancer / EGFR T790M Mutation Negative / Recurrent Lung Non-Small Cell Carcinoma / EGFR Activating Mutation / Stage IIIA Non-Small Cell Lung Cancer / Stage III Non-Small Cell Lung Cancer AJCC v7 / EGFR Exon 19 Deletion Mutation Treatment