SNOMED CT Concept Hierarchies for Sharing Definitions of Clinical Conditions Using Electronic Health Record Data. - DuWayne L. Willett; Vaishnavi Kannan; Ling Chu; Joel R. Buchanan; Ferdinand Velasco; John Clark; Jason C. Fish; Adolfo Ortuzar; Josh E. Youngblood; Deepa Bhat; Mujeeb Basit (Appl. Clin. Inform., 2018)