title: Heterogeneity in Tumors and Resistance to EGFR TKI Therapy-Letter.
authors.affiliation: Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, Colorado. Division of Thoracic Surgery, Department of Surgery, Kinki University Faculty of Medicine, Osaka-Sayama, Japan. kenichi.suda@ucdenver.edu.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Suda
authors.affiliation: Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Rivard
authors.affiliation: Division of Thoracic Surgery, Department of Surgery, Kinki University Faculty of Medicine, Osaka-Sayama, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Mitsudomi
authors.affiliation: Division of Medical Oncology, University of Colorado Anschutz Medical Campus, Aurora, Colorado.
authors.forename: Fred R
authors.initials: FR
authors.lastname: Hirsch
mesh_terms: D002289:Carcinoma, Non-Small-Cell Lung; D019008:Drug Resistance, Neoplasm; D066246:ErbB Receptors / Q000235:genetics*; D006801:Humans; D008175:Lung Neoplasms; D009154:Mutation; D047428:Protein Kinase Inhibitors
chemical_list: D047428:Protein Kinase Inhibitors; D066246:ErbB Receptors