Name	Info	Provider	Link
	free resource	BioMed Central	https://bmcpregnancychildbirth.biomedcentral.com/articles/10.1186/s12884-018-2014-8
Syphilis	free resource	MedlinePlus Health Information	https://medlineplus.gov/syphilis.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30290769/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30290769