1. Center
for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences,
College of Pharmacy, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
2. Center
for Nanotechnology in Drug Delivery, Molecular Pharmaceutics Division,
Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. Department
of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
4. Laboratory
of Functional and Molecular Imaging, National Institute of Neurological
Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, United States
5. Department
of Radiology, College of Medicine, University of Nebraska Medical Center, Omaha, Nebraska 68198, United States
6. Faculty
of
Chemistry, M.V. Lomonosov, Moscow State University, 119899 Moscow, Russia