1. Department of Biostatistics Institute of Psychiatry, Psychology & Neuroscience King's College London London UK
2. Department of Pediatrics, Gynaecology and Obstetrics Faculty of Medicine University of Geneva Geneva Switzerland
3. Department of Psychiatry Faculty of Medicine University of Geneva Geneva Switzerland
4. Great Ormond Street Institute of Child Health University College London London UK
5. Maudsley Centre for Child and Adolescent Eating Disorders South London and Maudsley NHS Foundation Trust London UK
6. Department of Child and Adolescent Psychiatry Institute of Psychiatry, Psychology & Neuroscience King's College London London UK