Name	Info	Provider	Link
	free resource	J-STAGE, Japan Science and Technology Information Aggregator, Electronic	https://dx.doi.org/10.2169/internalmedicine.4457-20
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32350198/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/32350198