1 The Patrick Wild Centre, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK; Division of Psychiatry, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK; NHS Lothian Learning Disability Service, Edinburgh, Scotland, UK. Electronic address: andrew.mckechanie@ed.ac.uk.
2 The Patrick Wild Centre, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK; Division of Psychiatry, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK.
3 The Patrick Wild Centre, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK; Division of Psychiatry, The University of Edinburgh, Edinburgh EH10 5HF, Scotland, UK; NHS Lothian Learning Disability Service, Edinburgh, Scotland, UK.