Alexandros Andreou MD, PhD, Director, Dept. of Neurosurgery and Interventional Neuroradiology, Hygeia Hospital, Athens, Greece Prof. Gerhard Bavinzski, Dept. of Neurosurgery, University of Vienna, Austria Prof. Rasulic Lukas,Dept. of Neurosurgery, Un. of Belgrade, Serbia Prof. Cenzato Marco, Dept. of Neurosurgery, Niguarda Hospital, Milan, Italy Assoc. Professor Nikolay Velinov MD, PhD,University Hospital Pirogov, Sofia, Bulgaria, Endovascular neurosurgeon, Director EANS Hands-on Courses Aikaterini Vlastou MD, Director, Dept. of Plastic Surgery, Hygeia Hospital Athens, Greece Prof. Ioannis Patsalas, Dept. of Neurosurgery, University of Thessaloniki, Greece Akis Frantzoglou MD, Director, Dept. of Neurosurgery, Nikaia Hospital, Athens, GreecePresident of Hellenic Neurosurgical Society Phillip Dodier MD, Dept. of Neurosurgery, University of Vienna, Austria Vladimir Papic MD, Ass. Professor, Dept. of Neurosurgery, University of Novi Sad, Serbia Triantafyllos Triantafyllou MD, PhD, Dept. of Neurosurgery, Lamia Hospital, Greece, Sotiris Plakas MD, Dept. of Neurosurgery and Interventional Neuroradiology, Hygeia Hospital, Athens, Greece Christos Chrysikopoulos MD, Dept. of Neurosurgery and Interventional Neuroradiology, Hygeia Hospital, Athens, Greece Dimitris Charitos MD, Dept. of Neurosurgery and Interventional Neuroradiology, Hygeia Hospital, Athens, Greece Panagiotis Georgis MD, Dept. of Neurosurgery and Interventional Neuroradiology, Hygeia Hospital, Athens, Greece Georgios Skandalakis, MD, M.Sc, B.Sc, PhD.Clinical fellow, Department of neurosurgery, University of New Mexico Hospital Loukas KalpouzosSenior Resident, University of Athens, Neurosurgical Department