1 Division of Neuroradiology, Department of Diagnostic Radiology, and Nuclear Medicine, University of Maryland School of Medicine, Baltimore, MD, USA. Electronic address: Prashant.raghavan@gmail.com.
2 Division of Interventional Neuroradiology, Department of Diagnostic Radiology, and Nuclear Medicine, University of Maryland School of Medicine, Departments of Neurology and Neurosurgery, University of Maryland School of Medicine, Baltimore, MD, USA. Electronic address: dgandhi@umm.edu.