Physico-Chemical Methods and Properties	Viral Disease Ontology Trunk	Source
http://purl.obolibrary.org/obo/PATO_0000052	http://purl.obolibrary.org/obo/FIX_0000498	LOOM
http://purl.obolibrary.org/obo/PATO_0000117	http://purl.obolibrary.org/obo/FIX_0000496	LOOM
http://purl.obolibrary.org/obo/PATO_0000125	http://purl.obolibrary.org/obo/FIX_0000479	LOOM