V. A. Byvaltsev
Irkutsk State Medical University, Ministry of Health; Railway Clinical Hospital Irkutsk-Passazhirskiy of Russian Railways Ltd; Irkutsk Scientific Center of Surgery and Traumatology; Irkutsk State Medical Academy of Postgraduate Education.
Russian Federation

Byvaltsev Vadim A., MD, DSc, Head of neurosurgery course, Irkutsk State Medical University; Chief Neurosurgeon, Head of Neurosurgery Center, Railway Clinical Hospital, Irkutsk; Head of Neurosurgery Department, Irkutsk Scientific Center of Surgery and Traumatology; Professor of the Department of Traumatology, Orthopedics and Neurosurgery, Irkutsk State Medical Academy of Postgraduate
Education.

1, Krasnogo Vosstaniya str., 664003-Irkutsk, Russia.

I. A. Stepanov
Irkutsk State Medical University, Ministry of Health.
Russian Federation

Stepanov Ivan A., post-graduate of the course of neurosurgery, Irkutsk State Medical University.

1, Krasnogo Vosstaniya str., 664003-Irkutsk, Russia.