1. Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States
2. Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington 98195, United States
3. Department of Laboratory Medicine and Pathology, University of Washington, Seattle, Washington 98195, United States
4. Department of Material Science and Engineering, University of Washington, Seattle, Washington 98195, United States
5. Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island 02912, United States
6. Department of Mechanical Engineering, University of Washington, Seattle, Washington 98195, United States
7. Department of Bioengineering, University of Washington, Seattle, Washington 98195, United States
8. Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, United States