Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0735-1097(97)00361-6
Pacemakers and Implantable Defibrillators	free resource	MedlinePlus Health Information	https://medlineplus.gov/pacemakersandimplantabledefibrillators.html