Kenneth J. Zucker, Ph.D., Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada Between 1976–2015, Dr. Zucker was affiliated with the Gender Identity Clinic for children and adolescents at the Centre for Addiction and Mental Health in Toronto, Canada. Currently he is Professor (Status Only), Department of Psychiatry, University of Toronto, and in private practice. His clinical research pertains to gender identity development in children and adolescents, gender dysphoria, and disorders of sex development. He was the Chair of the DSM-5 (2013) Work Group on Sexual and Gender Identity Disorders. Since 2002, he has been the Editor of Archives of Sexual Behavior. He is a Past-President of the International Academy of Sex Research. He has authored over 200 peer-reviewed articles and book chapters.