Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.jpalliativecare.com/article.asp?issn=0973-1075;year=2020;volume=26;issue=1;spage=120;epage=128;aulast=Alexander
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32132796/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/32132796