1. Department of Biomedical Engineering; College of Engineering; The Ohio State University; Columbus OH 43210 USA
2. Department of Pathology and the Neurological Research Institute; College of Medicine; The Ohio State University; Columbus OH 43210 USA
3. Campus Microscopy and Imaging Facility; The Ohio State University; Columbus OH 43210 USA
4. William G. Lowrie Department of Chemical and Biomolecular Engineering; College of Engineering; The Ohio State University; Columbus OH 43210 USA