Evaluation of adapted parent training for challenging behaviour in pre-school children with moderate to severe intellectual developmental disabilities: A randomised controlled tria... oleh Rachel Royston, Michael Absoud, Gareth Ambler, Jacqueline Barnes, Rachael Hunter, Marinos Kyriakopoulos, Tamara Ondruskova, Kate Oulton, Eleni Paliokosta, Monica Panca, Aditya Sharma, Vicky Slonim, Una Summerson, Alastair Sutcliffe, Megan Thomas, Chen Qu, Angela Hassiotis