KLF6 and lung cancer: spleen tyrosine kinase isoform-S (SkyS) (12) and human epidermal growth factor receptor (HER-2) (13) in breast cancer, B-cell lymphoma-extra large (Bcl-xL), Kruppel-like factor 6 (KLF6) and peroxisome proliferator-activated receptor gamma 1 (PPARγ1) in lung cancer (14) etc.