[1] Univ Edinburgh, Dept Psychol0, Edinburgh, Midlothian, Scotland
[2] MRC, Cognit & Brain Sci Unit, Cambridge, England
[3] Addenbrookes Hosp, Univ Dept Psychiat, Cambridge, England
[4] Addenbrookes Hosp, Univ Dept Clin Neurosci, Cambridge, England
[5] Prince Wales Med Res Inst, Sydney, NSW, Australia