1. Division of Infectious Diseases, Duke University Medical Center, Durham, NC, USA
2. Warren Alpert Medical School, Brown University, Providence, RI, USA
3. Center for Behavioral and Preventive Medicine, The Miriam Hospital, Providence, RI, USA
4. Department of Behavioral and Social Sciences, School of Public Health, Brown University, Providence, RI, USA
5. Division of Infectious Diseases, Department of Medicine, The Miriam Hospital, Brown University, Providence, RI, USA