Name	Info	Provider	Link
	subscription/membership/fee required	Nature Publishing Group	https://doi.org/10.1038/s41586-020-1954-0
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31945772/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31945772
Acetylcholine receptors (muscarinic) - overview and references	free resource	Guide to Pharmacology	https://www.guidetopharmacology.org/GRAC/FamilyDisplayForward?familyId=2