1. Section of Infectious Diseases Boston Medical Center (BMC) Boston MA USA
2. RTI International, Research Triangle NC USA
3. Montefiore Medical Center and Albert Einstein College of Medicine New York NY USA
4. Department of Population Health Sciences Weill Cornell Medical College New York City NY USA
5. Clinical Addiction Research and Education Unit, Section of General Internal Medicine, Boston Medical Center Boston MA USA
6. Boston University School of Medicine Boston MA USA
7. Divisions of General Internal Medicine and Infectious Diseases University of Colorado School of Medicine Aurora CO USA