1. Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, United States
2. Center for Engineering in Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
3. Department of Materials Science & Engineering, University of Washington, Seattle, Washington 98195, United States
4. Independent Consultant, Boulder, Colorado 80305, United States
5. Department of Epidemiology, University of Washington, Seattle, Washington 98195, United States
6. Department of Global Health, University of Washington, Seattle, Washington 98195, United States
7. Department of Medicine, University of Washington, Seattle, Washington 98195, United States
8. Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
9. Department of Family Medicine, University of Washington, Seattle, Washington 98195, United States