Name	Info	Provider	Link
	free resource	International Brazilian J Urol	https://www.intbrazjurol.com.br/pdf/vol46n01/Tobias-Machado_143_144.pdf
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31851478/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31851478