Professor of Vascular Surgery, St Georges

Dept of Vascular Surgery, Cardiac Surgery and Biomedical Engineering, Cleveland Clinic

Professor of radiology

Neurosurgery, Johns Hopkins, Columbia University

Professor and Chairman, Weill Cornell Medical College Department of Neurological Surgery

Professor of Neurosurgery, University of Cape Town

university of nebraska medical center

Professor of Neurosurgery and Radiology, Mayo Clinic

Santa Barbara Cottage Hospital

Neurosurgeon, Erasmus MC, Rotterdam, the Netherlands