-
Heart and Stroke FounÂdaÂtion. n.d. Canada. -
National CenÂter for BiotechÂnolÂogy InforÂmaÂtion. 2017. USA. -
CleveÂland Clinic. 2019. USA. -
National Heart Lung and Blood InstiÂtute. 2023. USA. -
MedÂline Plus. 2019. USA. -
MedÂline Plus. 2019. USA.