Name	Info	Provider	Link
Pacemakers and Implantable Defibrillators	free resource	MedlinePlus Health Information	https://medlineplus.gov/pacemakersandimplantabledefibrillators.html
	subscription/membership/fee required	Sunmedia PierOnline	http://www.pieronline.jp/openurl?issn=0021-5252&volume=71&issue=11&spage=919