1. Department of Surgery Johns Hopkins University School of Medicine Baltimore MarylandUSA
2. Center for Health Services and Outcomes Research Northwestern University Feinberg School of Medicine Chicago IllinoisUSA
3. Department of Plastic and Reconstructive Surgery Johns Hopkins University School of Medicine Baltimore MarylandUSA
4. Department of Surgery Northwestern University Feinberg School of Medicine Chicago IllinoisUSA
5. Department of Epidemiology Johns Hopkins University Bloomberg School of Public Health Baltimore MarylandUSA
6. Department of Acute and Chronic Care Johns Hopkins University School of Nursing Baltimore MarylandUSA