Authors
Alexandrina Nikova
Department of Neurosurgery, Asclipio Voulas Hospital, Athens, Greece
Department of Neurosurgery, Democritus university of Thrace, Alexandroupolis, Greece
Eustathios Vlachakis
Department of neurosurgery, Athens, Greece
Theodossios Birbilis
Department of Neurosurgery, Democritus university of Thrace, Alexandroupolis, Greece