“…With regards to the databases, through the literature search we were able to locate the ADHD-200 database (Alexander et al, 2017), which provides handedness data for ADHD and control participants. The ADHD-200 database is partially used in other publications (e.g., Tomasiello, 2020;Wang et al, 2019;Wyciszkiewics et al 2017), so we opted to include the full database as provided to us in January 2021 instead of those publications. Moreover, we came across the ENIGMA ADHD working group (Hoogman et al, 2017), via which we were able to locate six more databases (namely, Würzburg, Niche, ACPU, NICAP, IMpACT2) that were not used in any of the included studies.…”