Ubiquitous Dopamine Deficit Hypotheses in Cocaine Use Disorder Lack Support: Response to Leyton

Clifford M Cassidy¹, Anna B Konova¹, Anissa Abi-Dargham¹+2

• ¹University of Ottawa Institute of Mental Health Research, affiliated with The Royal, Ottawa (Cassidy); Department of Psychiatry, Columbia University College of Physicians and Surgeons, and New York State Psychiatric Institute, New York (Cassidy, Abi-Dargham, Martinez, Horga); Department of Psychiatry, Rutgers University, Piscataway, N.J. (Konova); Department of Psychiatry, Stony Brook University, Stony Brook, N.Y. (Abi-Dargham).