1. Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
2. Department of Radiology, University of Pennsylvania, Philadelphia, PA, USA
3. Department of Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, USA
4. Imaging Institute, Cleveland Clinic, Cleveland, OH, USA
5. Department of Diagnostic Medicine, Dell Medical School, University of Texas at Austin, Austin, TX, USA
6. Department of Neurosurgery, University of Pennsylvania, Philadelphia, PA, USA