1. Welsh Centre for Learning Disabilities; Institute of Psychological Medicine and Clinical Neurosciences; School of Medicine; Cardiff University; Cardiff UK
2. Health Economics and Policy Research Unit; Faculty of Health; Sport and Science; University of South Wales; Pontypridd UK
3. Psychology Department; College of Human and Health Sciences; Swansea University; Swansea UK
4. School of Psychology; University of Birmingham; Birmingham UK
5. Behavioural, Dementia & Psychological Services; Learning Disabilities Specialist Health Service; The Ridge Hill Centre; Black Country Foundation Partnership Trust; Stourbridge UK
6. Institute of Health and Wellbeing; College of Medical, Veterinary and Life Sciences; University of Glasgow; Glasgow UK
7. Directorate of Learning Disability Services; Abertawe Bro Morgannwg University Health Board; Bridgend UK
8. South East Wales Trials Unit; Institute of Primary Care & Public Health; School of Medicine; Cardiff University; Cardiff UK