Name	Info	Provider	Link
	free resource	GlyGen glycoinformatics resource	https://glygen.org/publication/PubMed/34491357/
Male Infertility	free resource	MedlinePlus Health Information	https://medlineplus.gov/maleinfertility.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34491357/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34491357
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/mbe/article-lookup/doi/10.1093/molbev/msab269