1. Center for Healthcare Organization & Implementation Research, Bedford VA Healthcare System, Bedford, Massachusetts
2. The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts
3. VA Boston Healthcare System, Boston, Massachusetts
4. VA Ann Arbor Healthcare System, Ann Arbor, Michigan
5. University of Michigan School of Medicine, Ann Arbor
6. Department of Statistics, Harvard University, Cambridge, Massachusetts
7. Center to Improve Veteran Involvement in Care, VA Portland Health Care System, Portland, Oregon
8. Division of Pulmonary and Critical Care Medicine, Oregon Health & Science University, Portland