STAT3 and non-small cell lung carcinoma: Typical treatment for NSCLC is chemotherapy for inhibiting several receptors and intracellular signaling such as epidermal growth factor receptor (EGFR), vascular endothelial growth factor receptor (VEGFR), insulin-like growth factor 1 receptor (IGF-1R), RAS proto-oncogene (RAS), mammalian target of rapamycin (mTOR), and signal transducer and activator of transcription 3 (STAT3) [5–8].