description link name Compound Role is Concomitant Medication. http://purl.obolibrary.org/obo/NCIT_C49568 Concomitant Medication Compound Role is Intervention. http://www.ebi.ac.uk/efo/EFO_0002571 Intervention Compound Role is Other. Other Compound Role is Substance Use. http://purl.bioontology.org/ontology/MEDDRA/10070964 Substance Use