Craig A Umscheid1,2,3,4, S Ryan Greysen3,4. 1. Center for Evidence-based Practice, University of Pennsylvania Health System, Philadelphia, Pennsylvania, USA. 2. Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA. craig.umscheid@uphs.upenn.edu. 3. Department of Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA. 4. Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia, Pennsylvania, USA.