Degenhardt, Louisa and Charlson, Fiona and Mathers, Bradley and Hall, Wayne D and Flaxman, Abraham D and Johns, Nicole and Vos, Theo (2014) The global epidemiology and burden of opioid dependence: results from the global burden of disease 2010 study. Addiction , 109 , (8) , pp. 1320-1333.

Salomon, Joshua A and Wang, Haidong and Freeman, Michael K and Vos, Theo and Flaxman, Abraham D and Lopez, Alan D and Murray, Christopher JL (2012) Healthy life expectancy for 187 countries, 1990-2010: a systematic analysis for the Global Burden Disease Study 2010. The Lancet , 380 , (9859) , pp. 2144-2162.