Name	Info	Provider	Link
Syphilis	free resource	MedlinePlus Health Information	https://medlineplus.gov/syphilis.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34899710/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34899710
	free resource	Frontiers Media SA	https://doi.org/10.3389/fimmu.2021.759474