Comprehensive analysis of publications concerning combinations of immunotherapy and targeted therapies for hepatocellular carcinoma: a bibliometric study - Gan, Biling; Wu, Lei; Zhou, Shunan; Chen, Zhihong; Wu, Fan; Xu, Lianqun; Chen, Zhenrong; Ma, Honghui; He, Peijia; Fang, Dan; Shi, Ning (Frontiers in Immunology, 2025)