Rachel Klein, PhD, is a former Fascitelli Family Professor of Child and Adolescent Psychiatry at NYU School of Medicine and a former senior clinician at the Child Mind Institute. Dr. Klein was appointed as an Expert Consultant to the Food & Drug Administration and as a member of a Research Task Panel for a President’s Commission on Mental Health. She has been a key contributor to the Diagnostic and Statistical Manual of Mental Disorders, from DSM-III through DSM-V.