Beta Cell Genomics Ontology	Placental Cell Type	Source
http://purl.obolibrary.org/obo/CL_0000094	https://pat.nichd.nih.gov/placentalcelltype/CT.02.02	LOOM
http://purl.obolibrary.org/obo/CL_0000542	https://pat.nichd.nih.gov/placentalcelltype/CT.02.05	LOOM
http://purl.obolibrary.org/obo/CL_0000037	https://pat.nichd.nih.gov/placentalcelltype/CT.07.06	LOOM