Article Title,Year,Volume,Issue,Page Range,Author Heart rate variability in concussed athletes: a case report using the smartphone electrocardiogram,2017,3,11,523-526,Lai Cardiac implantable electronic device malfunction after deceleration injury without obvious chest trauma,2019,5,5,285-287,Barakat Commotio cordis…once again: unusual occurrence in a noncontact sport,2023,9,12,855-857,Maron