1. Department of Biology, Chemistry and Health Science, Manchester Metropolitan University, Manchester M1 5GD, U.K.
2. Department of Pathology, University of Manchester Medical School, Christie Hospital, Manchester M13 9PT, U.K.
3. Department of Neurology, Stroke Unit, Hospital Universitario de Bellvitge (HUB), Barcelona, Spain
4. Insitut D'Investigació Biomedica de Belvitge (IDIBELL), Barcelona, Spain