AGT and atrial fibrillation: Cardiomyogenic differentiation of AF-MSCs was induced using different biologically active compounds or their combinations: angiotensin II (AngII), retinoic acid (RA), epigallocatechin gallate (EGCG), vitamin C, angiotensin II together with retinoic acid (AngII + RA), angiotensin II with EGCG (AngII + EGCG), and angiotensin II with vitamin C (AngII + Vit.