1. Department of Neurosurgery, Royal Melbourne Hospital, Melbourne, Victoria, Australia;
2. Department of Neurosurgery and Neurooncology, Medical University of Łódź, Łódzkie, Poland;
3. Department of Pathomorphology, Medical University of Gdańsk, Pomorskie, Poland;
4. Department of Medical Sciences, Section of Neurosurgery, Uppsala University, Uppsala, Sweden; and
5. Department of Surgery, Royal Melbourne Hospital, University of Melbourne, Victoria, Australia