H19 and cholangiocarcinoma: Consistence with the scratch wound healing assays, H19 and HULC significantly expedited migration (2.0-fold for H19 and 3.3-fold for HULC, Fig. 2b) and invasion (1.77-fold for H19 and 1.64-fold for HULC, Fig. 2c), which further strengthened the migration and invasion roles of H19 and HULC in CCA.