1. Departments of Neurosurgery, Helsinki University Hospital, University of Helsinki, Helsinki, Finland,
2. Departments of Neurosurgery, Umberto I General Hospital, Università Politecnica delle Marche, Ancona,
3. Departments of Neurosurgery, Ospedali Riuniti Marche Nord, Pesaro, Italy,
4. Department of Pathology, University of Helsinki and HUSLAB, Helsinki University Hospital, Helsinki, Finland,
5. Juha Hernesniemi International Center for Neurosurgery, Henan Provincial People’s Hospital, Zhengzhou, China.