1. Neurochirurgische Klinik of Klinikum Rechts der Isar, Munich, Germany
2. Department of Neurosurgery, Icahn School of Medicine at Mount Sinai, New York, NY, United States
3. Department of Neurosurgery, Evangelismos Hospital, National & Kapodistrian University of Athens, Greece
4. Essex Neurosciences Centre, Barking, Havering and Redbridge University NHS Trust, United Kingdom
5. Biomedical Engineering Unit, First Dept. of Cardiology, Hippokration Hospital, Medical School, National and Kapodistrian University of Athens, Athens, Greece
6. Department of Neurosurgery, Children's Hospital, Aghia Sofia, Athens, Greece