Willis TA, Hartley S, Glidewell L, Farrin AJ, Lawton R, McEachan RRC, Ingleson E, Heudtlass P, Collinson M, Clamp S, Hunter C, Ward V, Hulme C, Meads D, Bregantini D, Carder P, Foy R. Action to support practices implement research evidence (ASPIRE): protocol for a cluster-randomised evaluation of adaptable implementation packages targeting 'high impact' clinical practice recommendations in general practice. Implement Sci. 2016 Feb 29;11(25). doi: 10.1186/s13012-016-0387-5
Norton EC, Zarkin GA, Calingaert B, Bradley CJ. The effect of maternal substance abuse on the cost of neonatal care. Inquiry. 1996;33(3):247-57.