Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://cdnsciencepub.com/doi/10.1139/apnm-2020-0131?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=45&issue=12&spage=1324&aulast=Koltun
Menstruation	free resource	MedlinePlus Health Information	https://medlineplus.gov/menstruation.html