Prof. dr. Paul A. Boelen is full professor at the Department of Clinical Psychology at Utrecht University. He also works as a psychotherapist at Foundation Centrum'45. Paul Boelen is licensed supervisor and cognitive behavioral therapist with the Dutch Association for Cognitive and Behavioural Therapy. He is Editor-in-Chief of Gedragstherapie (Dutch Journal for Behaviour Therapy), and vice-head of the postmaster training for Healthcare Psychologist in Utrecht. Paul Boelen is also affiliated with ARQ National Psychotrauma Centre.