1. Clinical Research Group,
2. Ann Arbor Site of the Post-Deployment Cardiopulmonary Evaluation Network (PDCEN),
3. Pulmonary Section, Department of Medicine, and
4. Division of Pulmonary and Critical Care, Department of Medicine, University of Michigan, Ann Arbor, Michigan
5. Ambulatory Care Section, Environmental Health, Lieutenant Colonel Charles S. Kettles VA Medical Center, Ann Arbor, Michigan; and