University of Oxford - Linacre College, University of Oxford, University of Pittsburgh - Medical Center (UPMC), University of Pittsburgh - Medical Center (UPMC), University of Pittsburgh, School of Medicine, University of Pittsburgh Medical Center (UPMC), Department of Neurosurgery, University of Pittsburgh - Medical Center (UPMC), University of Pittsburgh - Medical Center (UPMC) and University of Pittsburgh, School of Medicine, University of Pittsburgh Medical Center (UPMC), Department of Neurosurgery