1. Division of Pulmonary and Critical Care Medicine, Elmhurst Hospital Center, Icahn School of Medicine at Mount Sinai, Elmhurst, New York
2. Oxford Centre for Respiratory Medicine, Churchill Hospital, Oxford, United Kingdom
3. Oxford Respiratory Trials Unit, Oxford, United Kingdom
4. Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
5. University College, Oxford, United Kingdom
6. Division of Pulmonary, Critical Care and Sleep Medicine, Westchester Medical Center, Valhalla, New York; and
7. New York Medical College, Valhalla, New York