Robust and Explainable Bicuspid Aortic Valve Diagnosis Using Stacked Ensembles on Echocardiography. - Christos Chrysanthos Nikolaidis; Vasileios Sachpekidis; Nikolas Moustakidis; Theofilos Moustakidis; Pavlos S. Efraimidis (CoRR, 2026)