EDDA Study Designs Taxonomy	The Prescription of Drugs Ontology	Source
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#cross_over_design	http://purl.obolibrary.org/obo/OBI_0500003	LOOM
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#time_series_design	http://purl.obolibrary.org/obo/OBI_0500020	LOOM
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#questionnaire	http://purl.obolibrary.org/obo/OBI_0001000	LOOM
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#factorial_design	http://purl.obolibrary.org/obo/OBI_0500014	LOOM
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#clinical_trial	http://purl.obolibrary.org/obo/OPMI_0004507	LOOM
http://ontologies.dbmi.pitt.edu/edda/StudyDesigns.owl#study_design	http://purl.obolibrary.org/obo/OBI_0500000	LOOM