1. Department of Neurology, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA
2. Department of Emergency Medicine, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA
3. Department of Neurology, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA; Department of Diagnostic Imaging, Rhode Island Hospital, Alpert Medical School of Brown University, Providence, Rhode Island, USA