Flow researchers have achieved comparable results without drugs, simply by altering neurobiological function. In 2007, working with Iraq War veterans at Camp Pendleton, occupational therapist Carly Rogers of the University of California, Los Angeles blended surfing (a reliable flow trigger) and talk therapy into a treatment for PTSD. It was essentially the same protocol Mithoefer used, only with the flow generated by action sports substituting for MDMA.