1. Institute of Psychiatry, Psychological Medicine, Section of Eating Disorders; King's College London; London UK
2. Department of Psychology; Dickinson College; Carlisle PA USA
3. Institute of Psychiatry, Psychology and Neuroscience; Department of Psychological Medicine, Section of Eating Disorders, King's College London; UK
4. Institute of Psychiatry, Psychology and Neuroscience; Department of Biostatistics and Health Informatics, King's College London; London UK
5. Personal Social Services Research Unit, London School of Economics & Political Science, London; UK and University of Kent; Canterbury UK