1. Pulmonary, Sleep and Critical Care Medicine, Department of Medicine, Denver Health Medical Center, Denver, Colorado
2. Acute Lung Injury Center of Excellence, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
3. Montefiore Medical Center, Bronx, New York
4. Department of Medicine, The Ohio State University, Columbus, Ohio; and
5. Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Miller School of Medicine, University of Miami, Miami, Florida