“…Since many persons living in this suburb are not registered, it was decided not to use a random sample from the birth and dead register. Instead, people were directly approached 'on the street', a method frequently used in studies on migrant health in the Netherlands (e.g., Gras et al, 1999;Kramer et al, 2008). Students of both Dutch and Surinamese descent helped to carry out the face-to-face interviews.…”