1. Divisions of Infectious Diseases, Massachusetts General Hospital, Boston, MA, USA
2. General Medicine, Massachusetts General Hospital, Boston, MA, USA
3. The Harvard University Center for AIDS Research (CFAR), Boston, MA, USA
4. Department of Biostatistics, Harvard School of Public Health, Boston, MA, USA
5. Department of Orthopedic Surgery Brigham and Women’s Hospital, Boston, MA, USA
6. Departments of Biostatistics and Epidemiology, Boston University School of Public Health, Boston, MA, USA
7. Department of Public Health, Weill Cornell Medical College, New York, NY, USA
8. Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, MA, USA
9. Department of Surgery, University of Washington, Seattle, WA, USA