1. Department of Materials Science & Engineering University of Michigan North Campus Research Complex, 2800 Plymouth Rd Ann Arbor MI 48109 USA
2. Department of Biomedical Engineering University of Michigan Carl A. Gerstacker Building, 2200 Bonisteel Blvd Ann Arbor MI 48109 USA
3. Department of Bioengineering University of Pennsylvania 240 Skirkanich Hall 210 S. 33rd Street Philadelphia PA 19104 USA
4. Department of Medicine Lung Biology Institute University of Pennsylvania 3450 Hamilton Walk, Stemmler Hall Philadelphia PA 19104 USA
5. BioFrontiers Institute and Department of Chemical and Biological Engineering University of Colorado Boulder 3415 Colorado Avenue, 596 UCB Boulder CO 80309 USA
6. Department of Internal Medicine – Gastroenterology University of Michigan 109 Zina Pitcher Place Ann Arbor MI 48109 USA
7. Institute of Functional Anatomy Charité – Universitätsmedizin Berlin Campus Charité Mitte, Philippstraße 12 10115 Berlin Germany
8. School of Veterinary Medicine University of Pennsylvania 3800 Spruce St Philadelphia PA 19104 USA