aMental Health service, Fiona Stanley Fremantle Hospitals Group, Murdoch, WA, Australia

bDept of Psychiatry, University of Cambridge, Cambridge, UK

Correspondence to Hisham Ziauddeen, MRCPsych, PhD, W5.32, W-block, Fremantle Hospital, Alma Street, Fremantle, WA, Australia. Tel: +61434030670; e-mail: [email protected]