PART B: Efficacy and Safety of AEVI-001 in Children and Adolescents With ADHD and Without mGluR Mutations

A Multicenter, 2-Part, 6-Week, Double-blind, Randomized, Placebo-controlled, Parallel-design Study to Assess the Efficacy and Safety of AEVI-001 in Children and Adolescents (Ages 6-17 Years) With Attention Deficit Hyperactivity Disorder and With or Without Copy Number Variants in Specific Genes Implicated in Glutamatergic Signaling and Neuronal Connectivity