SLC6A3 and attention deficit-hyperactivity disorder: The meta-analyses summary of all DAT1 3′-UTR VNTR analysis variations (long-allele vs. short-allele; 10-repeat vs. 9-repeat) with the entire publications, stratified to age of cases (child and adolescent or adult ADHD) and ethnical grouping is presented in Supplementary Tables S2 and S3.