TimothyWeaver Middlesex University United Kingdom In programme October 24 13:30 to 13:45 View hours & dates Hours & Dates Plenary session Poster session Big debate Structured session Workshop Oral presentation session Short communication session Poster guided tour Thursday, 24 October 13:30 Oral presentation Use of contingency management (positive reinforcement with financial incentives) to encourage abstinence from heroin (PRAISE): a UK cluster randomised trial 13:30 to 13:45 Insights zone 4 (I4) Nicola MetrebianTimothy Weaver