Computer-Based Patient Record Ontology Clinical Trials Gov Ontology Source
http://clinicaltrials.gov/ctgo#Site http://www.ifomis.org/bfo/1.1/snap#Site LOOM
http://clinicaltrials.gov/ctgo#Patient http://purl.org/cpr/patient LOOM
http://clinicaltrials.gov/ctgo#Procedure http://purl.org/cpr/procedure LOOM