Name	Info	Provider	Link
	free resource	J-STAGE, Japan Science and Technology Information Aggregator, Electronic	https://doi.org/10.1589/jpts.31.223
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30936635/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30936635
	subscription/membership/fee required	Medical Online, Meteo Inc	https://www.medicalonline.jp/meteo_linkout.php?issn=0915-5287&volume=31&issue=3&spage=223