Peggy T. Cohen-Kettenis, Ph.D., is Professor of gender development and psychopathology at the Department of Child and Adolescent Psychiatry, University Medical Center Utrecht. She was a pre- and postgraduate student in developmental and clinical psychology at the University of Utrecht, The Netherlands. She was trained to become a registered clinical psychologist and psychotherapist at the Utrecht Institute for Multidisciplinary Psychotherapy. After completing her Ph.D. thesis, she worked at the Department of Clinical Psychology of the Utrecht University. There, she conducted a study evaluating...