Counterfactual Understanding via Retrieval-Aware Multimodal Modeling for Time-to-Event Survival Prediction. - Ha-Anh Hoang Nguyen; Tri-Duc Phan Le; Duc-Hoang Pham; Huy-Son Nguyen; Cam-Van Thi Nguyen; Duc-Trong Le; Hoang-Quynh Le (ECIR (3), 2026)