1. Department of Neurosurgery, Provincial Specialist Hospital in Legnica, 59-220 Legnica, Poland
2. Department of Neurosurgery, Specialist Hospital in Walbrzych, 58-309 Walbrzych, Poland
3. Department of Physiotherapy, Wroclaw Medical University, 55-355 Wroclaw, Poland
4. Department of Nursing and Obstetrics, Wroclaw Medical University, 51-618 Wroclaw, Poland
5. Department of Neurosurgery, 4th Military Clinical Hospital in Wroclaw, 50-981 Wroclaw, Poland