Identification of validated case definitions for medical conditions used in primary care electronic medical record databases: a systematic review. - Kerry A. McBrien; Sepideh Souri; Nicola E. Symonds; Azin Rouhi; Brendan C. Lethebe; Tyler S. Williamson; Stephanie Garies; Richard Birtwhistle; Hude Quan; Gabriel E. Fabreau; Paul E. Ronksley (J. Am. Medical Informatics Assoc., 2018)