1. Department of Radiology, Stanford University, Stanford, California 94305, United States
2. Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States
3. Centre for Translational Pharmacology, School of Molecular Biosciences, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, U.K.
4. Department of Pharmaceutical Sciences, University of Milan, via Luigi Mangiagalli 25, 20133 Milano, Italy
5. Department of Neurology and Neurological Sciences, Stanford University, Stanford, California 94305, United States