Jane Ogden1, Amelia Hollywood2, Christopher Pring3. 1. Department of Psychology, University of Surrey, Guildford, GU2 7XH, UK. J.Ogden@surrey.ac.uk. 2. School of Pharmacy, Whiteknights, PO Box 226, Reading, RG6 6AP, UK. 3. Western Sussex Hospitals NHS Foundation Trust, St Richard's Hospital, Spitalfield Lane, Chichester, West Sussex, PO19 6SE, UK.