Clarke, Susan and Delamere, S and McCullough, L and Hopkins, S and Bergin, C and Mulcahy, Fiona (2003) Assessing limiting factors to the acceptance of antiretroviral therapy in a large cohort of injecting drug users. HIV Medicine, 4, (1), pp. 33-37. https://doi.org/10.1046/j.1468-1293.2003.00130.x.

National Advisory Committee on Drugs. Comiskey, Catherine and Kelly, Paul and Leckey, Y and McCullough, L and O’Duill, B and Stapleton, Robert and White, Emma (2009) The ROSIE study: Drug treatment outcomes in Ireland. Dublin: Stationery Office.