Integration and Harmonization of Multi-Source Obstetric Data Using Rule-Based NLP for Fetomaternal Risk Modelling. - Barrenetxea J; Grünewald E; Tabernig B; Sommer J; Schmiedler R; Sommer L; Sonnabend I; Ernst C; Recker F; Wegener S; Balzer F (Studies in health technology and informatics, 2026)