University College London - Department of Clinical and Experimental Epilepsy, University College London - Wellcome / EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London - University College London Medical School, University College London - Department of Clinical and Experimental Epilepsy, University College London - Department of Clinical and Experimental Epilepsy, University College London - Department of Medical Physics and Biomedical Engineering and University College London - Department of Clinical and Experimental Epilepsy