TGFB1 and intrahepatic cholangiocarcinoma: Remarkably, knockdown of TGF‐β1 via injecting tgfb1 morpholinos into abdomens of 2‐month‐old HCP‐HBx zebrafish reduced bile duct proliferation from 53% to 32%, fibrosis formation from 53% to 23%, and ICC development from 29% to 11%.84