1. Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, and
2. Pulmonary Fibrosis Foundation, Chicago, Illinois
3. Department of Biostatistics, University of Michigan, Ann Arbor, Michigan
4. Genentech, San Francisco, California
5. Division of Allergy, Pulmonary, and Critical Care Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee
6. Division of Pulmonary, Allergy, and Critical Care Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
7. Inova Fairfax Hospital, Falls Church, Virginia
8. Division of Pulmonary, Critical Care and Sleep Medicine, University of Washington, Seattle, Washington
9. Division of Pulmonary, Critical Care and Sleep Medicine, Yale University, New Haven, Connecticut
10. Division of Pulmonary and Critical Care Medicine, University of Virginia, Charlottesville, Virginia; and
11. Division of Pulmonary, Critical Care, Allergy and Sleep Medicine, University of California, San Francisco, San Francisco, California