1. Center for Healthcare Organization and Implementation Research, Edith Nourse Rogers Memorial Veterans Hospital, Bedford, Massachusetts2The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts3The Dartmouth Institute for Health Pol
2. Department of Research and Evaluation, Kaiser Permanente Southern California, Pasadena
3. Health Services Research and Development, Portland Veterans Affairs Medical Center, Portland, Oregon6Division of Pulmonary and Critical Care Medicine, Oregon Health and Science University, Portland
4. Center for Healthcare Organization and Implementation Research, Edith Nourse Rogers Memorial Veterans Hospital, Bedford, Massachusetts7Department of Health Policy and Management, Boston University School of Public Health, Boston, Massachusetts
5. The Dartmouth Institute for Health Policy and Clinical Practice, Dartmouth Medical School, Hanover, New Hampshire8Veterans Affairs Outcomes Group, Department of Veterans Affairs, White River Junction, Vermont