Name	Info	Provider	Link
	subscription/membership/fee required	Ediciones Doyma, S.L.	http://www.elsevier.es/en/linksolver/ft/pii/S0212-6567(19)30191-X
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0212-6567(19)30191-X
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome	free resource	MedlinePlus Health Information	https://medlineplus.gov/myalgicencephalomyelitischronicfatiguesyndrome.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31182238/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31182238