SNOMED CT	Placental Cell Type	Source
http://purl.bioontology.org/ontology/SNOMEDCT/56972008	https://pat.nichd.nih.gov/placentalcelltype/CT.02.05	LOOM
http://purl.bioontology.org/ontology/SNOMEDCT/418318001	https://pat.nichd.nih.gov/placentalcelltype/CT.07.06	LOOM