1. Center for Neuroscience and Regenerative Medicine , Bethesda, MD 20817 , USA
2. The Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc. , Bethesda, MD 20817 , USA
3. Radiology and Imaging Sciences, Clinical Center, National Institutes of Health , Bethesda, MD 20892 , USA
4. Section on Critical Brain Dynamics, National Institute of Mental Health, National Institutes of Health , Bethesda, MD 20892 , USA
5. Section on Quantitative Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health , Bethesda, MD 20892 , USA
6. Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health , Bethesda, MD 20892 , USA
7. Department of Biomedical Engineering, University of Arizona , Tucson, AZ 20892 , USA
8. Multiscale Imaging and Integrative Biophysics Unit, National Institute on Aging, National Institutes of Health , Bethesda, MD 20892 , USA