Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1341-321X(18)30032-1
Flu	free resource	MedlinePlus Health Information	https://medlineplus.gov/flu.html
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S1341-321X(18)30032-1
Full text from	free resource	Hokkaido University Collection of Scholarly and Academic Papers: HUSCAP	https://hdl.handle.net/2115/74500
	free resource	scite Smart Citations	https://scite.ai/reports/29487035