KLF6 and cancer: An array of mutations in splicing cis-acting sequences include those of LKB1 (liver kinase B1), KIT (v-kit Hardy-Zuckerman 4 feline sarcoma viral oncogene homolog), CDH17 (cadherin 17), KLF6 (Kruppel-like factor 6) and BRCA1 (breast cancer gene 1) in many types of cancers [47, 48].