“…Gambling problems were assessed mostly with South Oaks Gambling Screen [20,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37], which is the most used instrument in research literature. In four studies the Canadian Problem Gambling Index [21,38], the Problem Gambling Severity Index [39] or the Kurzfragebogen zum Glücksspielverhalten [29] were used, some of which by adding DSM criteria for gambling disorder.…”