[1] Univ E Anglia, Norwich Med Sch, Dept Clin Psychol, Norwich NR7 4TJ, Norfolk, England
[2] Child Dev Ctr, Child & Family Psychol Serv, Hosp Rd, Bury St Edmunds IP33 3ND, Suffolk, England
[3] Univ Cambridge, Dept Psychiat, Autism Res Ctr, Douglas House,18b Trumpington Rd, Cambridge CB2 8AH, England
[4] Natl Taiwan Univ Hosp & Coll Med, Dept Psychiat, Taipei, Taiwan
[5] Univ Toronto, Child & Youth Mental Hlth Collaborat Ctr Addict &, Toronto, ON, Canada
[6] Univ Toronto, Hosp Sick Children, Toronto, ON M5G 1X8, Canada
[7] Univ Toronto, Dept Psychiat, Toronto, ON, Canada
[8] Coventry Univ, Ctr Res Psychol Behav & Achievement, Coventry, W Midlands, England
[9] Univ Kent, Tizard Ctr, Canterbury CT2 7LR, Kent, England
[10] Hertfordshire Partnership Univ NHS Fdn Trust Nor, Broadland Clin, Norwich NR13 5EW, Norfolk, England
[11] Cambridgeshire & Peterborough NHS Fdn Trust, CLASS Clin, Fulbourn, Cambs, England