1. Department of Medicine Section of Infectious Diseases and Section of Health Services Research, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
2. Veterans Affairs Health Services Research and Development Center for Innovations in Quality, Effectiveness and Safety, Michael E. Debakey VA Medical Center, Houston, TX, USA
3. University of California, Berkeley, School of Public Health, Berkeley, CA, USA
4. Rice University, School of Humanities, Houston, TX, USA
5. Department of Medicine Section of Health Services Research, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
6. Department of Medical Social Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
7. Department of Social and Behavioral Sciences, Harvard School of Public Health, Boston, MA, USA