1. The Department of Engineering Science and Mechanics, The Pennsylvania State University, 212 Earth-Engineering Sciences Bldg, University Park, PA 16802, USA
2. Geisinger Medical Center, 100 North Academy Avenue, Danville, PA 17822, USA
3. The Department of Biomedical Engineering, The University of Arkansas, 4183 Bell Engineering Center, Fayetteville, AR 72701, USA
4. The Department of Neurosurgery, Milton S. Hershey Medical Center, 500 University Dr, Hershey, PA 17033, USA