1. Section of Hospital Medicine, University of Pennsylvania, Philadelphia, PA, USA
2. Division of Hospital Medicine, University of California San Francisco, San Francisco, CA, USA
3. Center for Health Care Innovation, University of Pennsylvania, Philadelphia, PA, USA
4. School of Medicine, University of California Davis, Davis, CA, USA
5. School of Public Health, University of Maryland, College Park, College Park, MD, USA
6. School of Medicine, Boston University, Boston, MA, USA, and
7. School of Nursing, University of California San Francisco, San Francisco, CA, USA