1 Department of Radiology, Mayo Clinic, Jacksonville, FL, USA; Department of Neurosurgery, Mayo Clinic, Jacksonville, FL, USA. Electronic address: middlebrooks.erik@mayo.edu.
2 Department of Neurosurgery, Mayo Clinic, Jacksonville, FL, USA.
3 Center of Neurology and Neurosurgery Associates (NeuroCENNA), BP-A Beneficência Portuguesa de São Paulo, São Paulo, Brazil.