Dr. Klaus Wölfling, Director of Psychology, and Dr. Kai W. Müller, Head of Research and Diagnosis in the Outpatient Department for Gambling Addiction in Mainz; Prof. Manfred E. Beutel, Director of the Department of Psychosomatic Medicine at Mainz University Medical Centre; and Isabel Bengesser, psychotherapist at Salus Hospital, Friedrichsdorf, are all involved in the treatment of behavioural addi...