Helfer, Bartosz ORCID: 0000-0001-9863-2871 , Bozhilova, Natali, Cooper, Ruth E. ORCID: 0000-0002-9735-4731 , Douzenis, Joanna I., Maltezos, Stefanos and Asherson, Philip (2020) The key role of daytime sleepiness in cognitive functioning of adults with attention deficit hyperactivity disorder. European Psychiatry, 63 (1):e31. ISSN 0924-9338 (Print), 1778-3585 (Online) (doi:https://doi.org/10.1192/j.eurpsy.2020.28)