EGFR and squamous cell lung carcinoma: Lung Cancer, lung neoplasms, idiopathic pulmonary arterial hypertension, heritable pulmonary arterial hypertension, scleroderma associated pulmonary arterial hypertension, NSCLC, EGFR gene amplification, advanced cancer stage IIIB NSCLC, stage IV NSCLC, adenosquamous lung carcinoma, bronchioloalveolar carcinoma, large cell lung carcinoma, lung adenocarcinoma non-small cell lung carcinoma, recurrent non-small cell lung carcinoma, squamous cell lung carcinoma, stage IIIA & IIIB Non-small cell lung cancer, chronic obstructive pulmonary disease.