1. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Northwestern University, Chicago, IL.
2. Northwestern University Feinberg School of Medicine, Chicago, IL.
3. Galter Health Sciences Library, Northwestern University Feinberg School of Medicine, Chicago, IL.
4. Division of Pulmonary and Critical Care Medicine, Department of Medicine, Oregon Health and Science University, Portland, OR.
5. Division of Allergy, Pulmonary, and Critical Care Medicine, Department of Medicine, University of Wisconsin, Madison, WI.
6. Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL.
7. Northwestern Quality Improvement, Research, and Education in Surgery (NQUIRES), Department of Surgery, Northwestern University, Chicago, IL.
8. Center for Health Services and Outcomes Research, Institute of Public Health and Medicine, Northwestern Feinberg School of Medicine, Chicago, IL.