1. Department of Mechanical Engineering University of Minnesota Minneapolis MN 55455 USA
2. Center for Advanced Technologies for the Preservation of Biological Systems (ATP‐Bio) University of Minnesota Minneapolis MN 55455 USA
3. School of Materials Science and Engineering Sun Yat‐sen University Guangzhou 510275 China
4. Department of Neurosurgery University of Minnesota Minneapolis MN 55455 USA
5. Stem Cell Institute University of Minnesota Minneapolis MN 55455 USA
6. Department of Biomedical Engineering University of Minnesota Minneapolis MN 55455 USA