1 Division of Cerebrovascular Neurosurgery, Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA. Electronic address: Pascal.jabbour@jefferson.edu.
2 Division of Cerebrovascular Neurosurgery, Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA.
3 Division of Neuro-oncology, Department of Neurosurgery, Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, USA.