1. Maudsley Centre for Child and Adolescent Eating Disorders, South London, and Maudsley NHS Foundation Trust, De Crespigny Park, Denmark Hill, London SE5 8AZ, UK
2. Institute of Psychiatry, Psychology and Neuroscience, King’s College London, De Crespigny Park, London SE5 8AZ, UK
3. Department of Human Nutrition and Dietetics, School of Health Sciences, London Metropolitan University, 166-220 Holloway Road, London N7 8DB, UK
4. Department of Child and Adolescent Psychiatry, Institute of Psychiatry, Psychology and Neuroscience, King’s College London, De Crespigny Park, London SE5 8AZ, UK