FFAR2 and non-small cell lung carcinoma: To determine whether the reverse correlation between FFAR2 and TLR2/3 in NSCLC patients was associated with gene sets for FFAR2- or TLR2/3-related pathways, GSEA was further performed in FFAR2DownTLR2UpTLR3Up NSCLC samples (Group A) vs. FFAR2UpTLR2DownTLR3Down NSCLC samples (Group B).