1. Pulmonary and Critical Care, University of Vermont College of Medicine, Burlington, Vermont
2. Department of Biomedical Informatics and Medical Education, University of Washington School of Medicine, Seattle, Washington
3. Woolcock Institute of Medical Research, Syndey, New South Wales, Australia
4. Pulmonary and Critical Care, Johns Hopkins University, Baltimore, Maryland; and
5. Pulmonary and Critical Care Wake Forest School of Medicine, Winston-Salem, North Carolina