1. Department of Mechanical Engineering,
2. Medical Service, Veterans Affairs Palo Alto Health Care System, Division of Pulmonary, Allergy & Critical Care Medicine, Stanford University, Stanford, California; and
3. Department of Electrical Engineering,
4. Department of Medicine, University of Vermont Larner College of Medicine, Burlington, Vermont
5. BREATHE Center, School of Medicine, and
6. Department of Bioengineering, University of California Riverside, Riverside, California;