[1] Royal Holloway Univ London, Dept Psychol, Egham, Surrey, England
[2] Univ Oxford, Nuffield Dept Primary Care Hlth Sci, Oxford, England
[3] Cent & North West London NHS Fdn Trust, Vincent Sq Eating Disorder Serv, London, England
[4] Cardiff Univ, South Wales Doctoral Programme Clin Psychol, Sch Psychol, Cardiff CF10 3AT, S Glam, Wales