1 Norwich Medical School, University of East Anglia, Norwich, United Kingdom.
2 Research Development Programme, Norfolk and Suffolk National Health Service Foundation Trust, St Andrew's Lodge, Julian Hospital, Norwich, United Kingdom.
3 Institute of Cognitive Neuroscience, University College London, London, United Kingdom.
4 School of Psychology, University of East Anglia, Norwich, United Kingdom.
5 Norfolk and Norwich University Hospitals National Health Service Foundation Trust, Norwich, United Kingdom.