1 Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
2 Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA. Electronic address: [email protected].