DepartmentofRespiration;
PekingUnionMedicalCollegeHospital;
PekingUnionMedicalCollege;
ChineseAcademyofMedicalSciences;
BeijingChina;
DepartmentofRespiration;
PekingUnionMedicalCollegeHospital;
PekingUnionMedicalCollege;
ChineseAcademyofMedicalSciences;
BeijingChi;
non-small cell lung cancer; erlotinib; receptor; epidermal growth factor; KRAS; RNA; messager; mutation;