1. Center for American Indian Health Research, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
2. Pulmonary Disease & Critical Care Medicine Unit, College of Medicine, University of Vermont, Burlington, Vermont
3. Department of Physical Therapy, University of Delaware, Newark, Delaware
4. Missouri Breaks Industries Research Inc., Timber Lake, South Dakota
5. MedStar Research Institute, Phoenix Field Office, Phoenix, Arizona