1. Division of Pulmonary and Critical Care Medicine
2. Vera Moulton Wall Center for Pulmonary Vascular Disease at Stanford, and
3. Quantitative Sciences Unit, Stanford University School of Medicine, Stanford, California
4. Pacific Institute for Research and Evaluation, Oakland, California
5. Swedish Medical Center, Seattle, Washington
6. Department of Pathology, Stanford University School of Medicine, Stanford, California
7. Santa Clara County Medical Examiner, Santa Clara, California
8. Pulmonary Sciences and Critical Care Medicine, University of Colorado, Denver, Colorado
9. Department of Pediatrics, Stanford University School of Medicine, Stanford, California
10. University of California San Francisco, San Francisco, California; and
11. Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania