Name	Info	Provider	Link
	free resource	BioMed Central	https://bmchealthservres.biomedcentral.com/articles/10.1186/s12913-020-05917-9
Caregivers	free resource	MedlinePlus Health Information	https://medlineplus.gov/caregivers.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33256723/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33256723
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-HLA-B-1
Full text from	free resource	Diposit Digital de la Universitat de Barcelona	http://hdl.handle.net/2445/177146