Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29564319/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29564319
	free resource	Korean Society of Obstetrics and Gynecology	https://ogscience.org/DOIx.php?id=10.5468/ogs.2018.61.2.267
	free resource	M2PI	https://dx.doi.org/10.5468/ogs.2018.61.2.267
	free resource	scite Smart Citations	https://scite.ai/reports/29564319