Cluster analysis of hepatocellular carcinoma prognosis using preoperative alpha-fetoprotein and des-gamma-carboxy prothrombin levels: a multi-institutional study. - Saegusa Y; Imaoka Y; Ohira M; Kobayashi T; Honmyo N; Hamaoka M; Onoe T; Takei D; Oishi K; Abe T; Nakayama T; Akabane M; et al. (Journal of gastrointestinal surgery : official journal of the Society for Surgery of the Alimentary Tract, 2025)