EGFR	Epithelial Growth Factor Receptor
TKI	Tyrosine Kinase Inhibitors
NSCLC	Non-Small-Cell Lung Carcinoma
FFPE	Formalin-Fixed Paraffin-Embedded
ErbB2	Erb-B2 Receptor Tyrosine Kinase 2
MAPK	Mitogen-Activated Protein Kinases
WHO	World Health Organization
PA	pack years
IHC	Immunohistochemistry
Wt	Wild type