Elna Yadin was awarded her PhD in May 1979 from Bryn Mawr College and her postdoctoral studies from the University of Pennsylvania. She is a clinical faculty member at the Department of Psychiatry at the University of Pennsylvania and an affiliate in Psychology at Bryn Mawr College. Elna Yadin has extensive experience in the treatment of anxiety, stress and obsessivecompulsive disorders, and has provided disability support and advocacy. She continues to train and supervise healthcare professionals both nationally and internationally in the practice of Prolonged Exposure (PE) for PTSD and Exposure and Ritual Prevention (ERP) for OCD.