1. Center for Quality of Care Research; Baystate Medical Center; Springfield Massachusetts
2. Division of General Internal Medicine; Baystate Medical Center; Springfield Massachusetts
3. Tufts Clinical and Translational Science Institute and Tufts University School of Medicine; Boston Massachusetts
4. Pulmonary Division; Harborview Medical Center; University of Washington Medicine; Seattle Washington
5. Center for Health Research & Department of Pulmonary and Critical Care Medicine; Kaiser Permanente Northwest; Portland Oregon
6. University of Illinois-Jesse Brown VAMC; Chicago Illinois
7. Division of Pulmonary and Critical Care; University of Chicago Medical Center; Chicago Illinois
8. Division of Pulmonary and Critical Care Medicine; University of North Carolina School of Medicine; Chapel Hill North Carolina
9. University of Massachusetts Amherst, School of Public Health Sciences; Amherst Massachusetts