Interpretable Feature Extraction from Clinical Notes for Sepsis Prediction: Comparing Rule-Based, LLM, and Hybrid Approaches. - Frey N; Meyer-Eschenbach F; Voge L; Ruhm L; Wagnitz J; Näher AF; Grünewald E; Nothacker J; von Kalle C; Kumpf O; Balzer F (Studies in health technology and informatics, 2026)