[1] South Essex Partnership Univ NHS Fdn Trust, Serv People Who Have Learning Disabil, Specialist Healthcare Team, Twinwoods Resource Ctr, Clapham, Beds, England
[2] UCL, Res Dept Clin Educ & Hlth Psychol, London, England
[3] Oxleas NHS Trust, Bromley Community Team People Learning Disabil, London, England