1 From the Aurora Neuroscience Innovation Institute, Milwaukee, WI (W.R.G.).
2 Department of Neurosurgery, School of Medicine, Collegium Medicum, University of Warmia and Mazury, Olsztyn, Poland (D.G.).
3 Division of MR Research, Russell H. Morgan Department of Radiology and Radiological Science (P.W.), The Johns Hopkins University School of Medicine, Baltimore, MD.
4 Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering (P.W.), The Johns Hopkins University School of Medicine, Baltimore, MD.