Regorafenib enhances antitumor immunity via inhibition of p38 kinase/Creb1/Klf4 axis in tumor-associated macrophages ==================================================================================================================== * Da-Liang Ou * Chia-Wei Chen * Chia-Lang Hsu * Chih-Hung Chung * Zi-Rui Feng * Bin-Shyun Lee * Ann-Lii Cheng * Muh-Hwa Yang * Chiun Hsu