Name	Info	Provider	Link
	free resource	International Brazilian J Urol	https://www.intbrazjurol.com.br/pdf/vol45n01/Donmez_145_149.pdf
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30620155/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30620155