“…Furthermore, several studies have shown higher rates of pathological gambling among drug addicts (cf. Cunningham-Williams, Cottler, Compton, Spitznagel & Ben-Abdallah, 2000;Langenbucher, Bavly, Lavouvie, Sanjuan & Martin, 2001;Orford et al, 2003;Spunt, Dupont, Lesieur, Liberty & Hunt, 1998;Steinberg, Kosten & Rounsaville, 1992;Toneatto & Brennan, 2002;Toneatto, Ferguson & Brennan, 2003;Villas, Collakis, Magalhäes & da Silveira, 2005), and have demonstrated its influence on therapeutic results (Ledgerwood & Downey, 2002). Moreover, several studies with methadone patients have found rates of current pathological gambling ranging from 7% to 18% (Feigelman, Kleinman, Lesieur, Millman & Lesser, 1995;Ledgerwood & Downey, 2002;Spunt, Lesieur, Liberty & Hunt, 1996).…”