Andrew P J Olson1, Mark L Graber2, Hardeep Singh3. 1. Departments of Medicine and Pediatrics, University of Minnesota Medical School, Minneapolis, MN, USA. olso5714@umn.edu. 2. Society to Improve Diagnosis in Medicine, New York, NY, USA. 3. Houston Veterans Affairs Center for Innovations in Quality, Effectiveness and Safety, Michael E. DeBakey Veterans Affairs Medical Center and the Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA.