Details10-mei-2004J.E.E. Verdurmen a.o. Under-utilisation of Addiction Treatment Services by Heroin users from Ethnic Minorities: Results from a Cohort Study Over Four Years For content see: http://informahealthcare.com/doi/abs/10.1080/1606635042000210347 Memento Amsterdam2019-04-18T13:55:02+00:00