Regarding amniotic fluid cells, Bai and co-workers in 2012 [15] compared human AF-derived c-Kit+ stem cells with the c-Kit− population, demonstrating that both types of AFS cells could differentiate along adipogenic and osteogenic lineages, while the myocardial differentiation capacity was enhanced in c-Kit+ AFS cells. The gene discussed is KIT; the disease is atrial fibrillation.