Syrona: an open-source visual analytics tool for pairwise comparison of health datasets in OMOP CDM - M. Pajusalu; M. Oja; K. Mooses; S. Heinsar; T. Laisk; G. Grents; T. Tillmann; S. Laur; S. Reisberg; J. Vilo; R. Kolde (BMC Medical Informatics and Decision Making, 2026)