1. Department of Neurosurgery, The St. Hedwig’s Regional Specialist Hospital, 45-221 Opole, Poland
2. Department of Neurosurgery, Institute of Medical Sciences, University of Opole, 45-040 Opole, Poland
3. Center for Minimally Invasive Spine and Peripheral Nerve Surgery neurochirurg.opole.pl, 45-064 Opole, Poland
4. Faculty of Electrical Engineering, Automatic Control and Informatics, Opole University of Technology, 45-758 Opole, Poland
5. Department of Neurosurgery, The National Institute of Medicine of the Ministry of Internal Affairs and Administration, 02-507 Warsaw, Poland