Special edition on the occasion of Jan K. Buitelaar’s 65th anniversary

Altgassen M et al (2019) Prospective memory (partially) mediates the link between ADHD symptoms and procrastination. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0273-x (this issue) Baumeister S et al (2019) The impact of successful learning of self-regulation on reward processing in children with ADHD using fMRI. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0269-6 (this issue) Bijlenga D et al (2019) The role of the circadian system in the etiology and pathophysiology of ADHD: time to redefine ADHD?. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0271-z (this issue) Bitter I et al (2019) ADHD: a hidden comorbidity in adult psychiatric patients. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-019-00285-9 (this issue) Faraone S et al (2019) Effect of disease-associated SLC9A9 mutations on protein–protein interaction networks: implications for molecular mechanisms for ADHD and autism. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0281-x (this issue) Gerlach M et al (2019) Family-based association study on functional alpha-synuclein polymorphisms in attention-deficit/hyperactivity disorder. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-019-00286-8 (this issue) Manor I (2019) Does the test of variables of attention (TOVA) have a practice effect in adult ADHD? ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0278-5 (this issue) Möricke E et al (2019) Social-communicative and attention problems in infancy and toddlerhood as precursors of preschool autistic traits. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-00284-2 (this issue) Müller UC, Asherson P, Banaschewski T, Buitelaar JK, Ebstein RP, Eisenberg J, Gill M, Manor I, Miranda A, Oades RD, Roeyers H, Rothenberger A, Sergeant JA, Sonuga-Barke EJ, Thompson M, Faraone SV, Steinhausen HC (2011a) The impact of study design and diagnostic approach in a large multi-centre ADHD study. Part 1: ADHD symptom patterns. BMC Psychiatry 11:54. https://doi.org/10.1186/1471-244X-11-54 Müller UC, Asherson P, Banaschewski T, Buitelaar JK, Ebstein RP, Eisenberg J, Gill M, Manor I, Miranda A, Oades RD, Roeyers H, Rothenberger A, Sergeant JA, Sonuga-Barke EJ, Thompson M, Faraone SV, Steinhausen HC (2011b) The impact of study design and diagnostic approach in a large multi-centre ADHD study: part 2: dimensional measures of psychopathology and intelligence. BMC Psychiatry 11:55. https://doi.org/10.1186/1471-244X-11-55 Nobel E et al (2019) Parent-clinician agreement in rating presence and severity of attention-deficit/hyperactivity disorder symptoms. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0267-8 (this issue) Salum AG et al (2019) Reaction time variability and attention-deficit/hyperactivity disorder: is increased reaction time variability specific to attention-deficit/hyperactivity disorder? Testing predictions from the default-mode interference hypothesis. ADHD Attent Deficit Hyperact Disord. https://doi.org/10.1007/s12402-018-0257-x (this issue) von Rhein D, Mennes M, van Ewijk H, Groenman AP, Zwiers MP, Oosterlaan J, Heslenfeld D, Franke B, Hoekstra PJ, Faraone SV, Hartman C, Buitelaar J (2015) The NeuroIMAGE study: a prospective phenotypic, cognitive, genetic and MRI study in children with attention-deficit/hyperactivity disorder. Design and descriptives. Eur Child Adolesc Psychiatry 24:265–281