Affiliation: | 1. Institute of Psychiatry , De Crespigny Park, London, England , SE5 8AF;2. Department of Psychological Medicine , Gartnavel Royal Hospital , 1055 Great Western Road, Glasgow, Scotland , G12 OXH;3. Department of Prosthetic Dentistry , Glasgow Dental Hospital , 378 Sauchiehall Street, Glasgow, Scotland , G2 3JZ |