CX3CR1 regulates angiogenesis and activation of pro-angiogenic factors and triggers macrophage accumulation in experimental hepatopulmonary syndrome model Haiyuan Liu; Huajian Gu; Lelin Gu; Jun Liao; Xianwu Yang; Changhao Wu; Xun Ran; Xiansong Feng; Shi Zuo; Haiyang Li;