1. aSchool of Medicine, National University of Ireland Galway, Galway, Ireland
2. Department of Neurosurgery, Cork University Hospital, Cork, Ireland
3. The Loyal and Edith Davis Neurosurgical Research Laboratory, Department of Neurosurgery, Barrow Neurological Institute, St. Joseph’s Hospital and Medical Center, Phoenix, AZ, USA
4. Department of Neuropathology, Cork University Hospital, Cork, Ireland