1. Clinical Research Fellow, Department of Neurosurgery, King's College Hospital, Denmark Hill, London, UK
2. Clinical Fellow, Department of Neurosurgery, King's College Hospital, Denmark Hill, London, UK
3. First Department of Neurosurgery - AHEPA Hospital, Aristotle University of Thessaloniki, Greece
4. Professor of Neurosurgery, Department of Neurosurgery, King's College Hospital, Denmark Hill, London, UK