[1] Inst Psychiat Psychol & Neurosci, Kings Coll London, Ctr Res Eating & Weight Disorders, Dept Psychol Med, De Crespigny Pk, London SE5 8AB, England
[2] Inst Psychiat Psychol & Neurosci, Kings Coll London, Ctr Implementat Sci, Populat Res Dept, De Crespigny Pk, London SE5 8AF, England
[3] South London & Maudsley NHS Fdn Trust, Eating Disorders Outpatient Serv, Denmark Hill, London SE5 8AZ, England