Dr. David Yusko is a nationally recognized expert in prolonged exposure (PE) therapy for Posttraumatic Stress Disorder (PTSD) is one of a handful of experts on the concurrent treatment of PTSD and substance use disorders. Dr. Yusko talks about how you should work with someone who is struggling with both PTSD and substances, how extremely prevalent that is, and why it is so hard to get information about effective PTSD treatments out there, especially in the addiction community.