1. Travis F, Grosswald S, Stixrud W. ADHD, brain functioning, and transcendental meditation practice. Mind Brain J Psychiatr. 2011;2(1):73-81.
2. Sadock BJ, Sadock VA. Kaplan and Sadock's synopsis of psychiatry: behavioral sciences/clinical psychiatry. Philadelphia: Lippincott Williams & Wilkins; 2011.
3. Grizenko N, Shayan YR, Polotskaia A, Ter-Stepanian M, Joober R. Relation of maternal stress during pregnancy to symptom severity and response to treatment in children with ADHD. J Psychiatry Neurosci. 2008;33(1):10-6. PMID: 18197267
4. Linnet KM, Dalsgaard S, Obel C, Wisborg K, Henriksen TB, Rodriguez A, et al. Maternal lifestyle factors in pregnancy risk of attention deficit hyperactivity disorder and associated behaviors: review of the current evidence. Am J Psychiatry. 2003;160(6):1028-40. PMID: 12777257 DOI: 10.1176/appi.ajp.160.6.1028
5. Amiri S, Fakhari A, Golmirzaei J, Mohammadpoorasl A, Abdi S. Tourette's syndrome, chronic tics, and comorbid attention deficit/hyperactivity disorder in elementary students. Arch Iran Med. 2012;15(2):76-8. PMID: 22292574