Professor and Chairman, University of Washington School of Medicine

University at Buffalo Neurosurgery

Professor, University of Washington Department of Neurological Surgery

WVU Medicine Rockefeller Neuroscience Institute

Chair, Department of Neurological Surgery, Ohio State University Wexner Medical Center

University of Miami

Professor of Neurological Surgery, University of California, Irvine

Stanford University

Professor of Neurological Surgery, OHSU

University of Kentucky