Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0165-6147(12)00059-4
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0165-6147(12)00059-4
HCN2 - data and references	free resource	Guide to Pharmacology	https://www.guidetopharmacology.org/GRAC/ObjectDisplayForward?objectId=401
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:22613784