Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31673490/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31673490
	free resource	Korea Disease Control and Prevention Agency	https://doi.org/10.24171/j.phrp.2019.10.5.05