1. Department of Emergency Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
2. Department of Biobehavioral Health, Pennsylvania State University, University Park, PA, USA
3. School of Nursing, University of Pennsylvania, Philadelphia, PA, USA
4. Department of Health Services, Policy and Practice, School of Public Health, Brown University, Providence, RI, USA
5. Department of Biostatistics, Center for Statistical Sciences, School of Public Health, Brown University, Providence, RI, USA
6. Fenway Health and Division of Infectious Diseases, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA