Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0003-9861(09)00286-0
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19733148/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19733148
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-PTHrP-1