1. Centro Hospitalar Lisboa Central Departamento de Neurocirurgia, Hospital São José, , Lisboa 1150-199, Portugal
2. King’s College Hospital Foundation Trust Neurosurgical Department, , London SE5 9RS, UK
3. King’s College London School of Biomedical Engineering and Imaging Sciences, , London SE5 9RS, UK
4. Neurocenter of Southern Switzerland, Ente Ospedaliero Cantonale Department of Neurosurgery, , Lugano 6903, Switzerland