| Affiliation: | 1. Center for American Indian Health Research, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma;2. Pulmonary Disease and Critical Care Medicine Unit, College of Medicine, University of Vermont, Burlington, Vermont;3. Missouri Breaks Industries Research Inc., Timber Lake, South Dakota;4. Department of Physical Therapy, University of Delaware, Newark, Delaware;5. Barbara V. Howard, PhD, MedStar Research Institute, Hyattsville, Maryland;6. Weill Cornell Medical College, New York, New York |
