1. Department of Epidemiology and Biostatistics, George Washington University, Milken Institute School of Public Health, Washington, DC, USA
2. Division of Infectious Diseases, The Miriam Hospital, Providence, RI, USA
3. Division of Infectious Diseases, Brown University Alpert School of Medicine, Providence, RI, USA
4. Yale University School of Nursing, New Haven, CT, USA
5. Department of Biostatistics, Brown University School of Public Health, Providence, RI, USA