1. Department of Civil & Mechanical Engineering, University of Missouri-Kansas City, Kansas City, Missouri 64110, USA
2. Department of Materials Science & Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
3. Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA
4. Laboratory of Molecular and Chemical Biology of Neurodegeneration, École polytechnique fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
5. Blue Brain Project, École polytechnique fédérale de Lausanne (EPFL), Campus Biotech, Geneva 1202, Switzerland