Name	Info	Provider	Link
	free resource	J-STAGE, Japan Science and Technology Information Aggregator, Electronic	https://dx.doi.org/10.1253/circj.CJ-21-1028
Pacemakers and Implantable Defibrillators	free resource	MedlinePlus Health Information	https://medlineplus.gov/pacemakersandimplantabledefibrillators.html