Mohammed Rahim Hassan, Zahraa Sabar Omran, and Atheer Hameid AL-Ghanimi, “The Relationship between Cadmium and Tyrosine Hydroxylase Activity in Patients with Attention Deficit Hyperactivity Disorder (ADHD)”, Karbala J M, vol. 18, no. 2, pp. 3023–3028, Dec. 2025.