RT Book, Section A1 Reus, Victor I. A2 Hauser, Stephen L. A2 Josephson, S. Andrew SR Print(0) ID 1147191778 T1 MENTAL DISORDERS T2 Harrison's Neurology in Clinical Medicine, 4e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259835865 LK neurology.mhmedical.com/content.aspx?aid=1147191778 RD 2024/04/19 AB Mental disorders are common in medical practice and may present either as a primary disorder or as a comorbid condition. The prevalence of mental or substance use disorders in the United States is approximately 30%, but only one-third of affected individuals are currently receiving treatment. Global burden of disease statistics indicate that 4 of the 10 most important causes of morbidity and attendant health care costs worldwide are psychiatric in origin.