Co-occurring medical and behavioural conditions in children with Down syndrome with or without ADHD symptom presentation. - Esbensen AJ; Vincent LB; Epstein JN; Kamimura-Nishimura K; Wiley S; Angkustsiri K; Abbeduto L; Fidler D; Anixt JS; Froehlich TE (Journal of intellectual disability research : JIDR, 2022)