Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1323-8930(14)00033-1
Vitamin C	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitaminc.html
	subscription/membership/fee required	Medical Online, Meteo Inc	https://www.medicalonline.jp/meteo_linkout.php?issn=1323-8930&volume=64&issue=2&spage=194