REFERENCES
- Degenhardt , L. and Hall , W. 2012 . Extent of illicit drug use and dependence, and their contribution to the global burden of disease . Lancet , 379 ( 9810 ) : 55 – 70 .
- Mueser , K. , Drake , R. and Wallach , M. 1998 . Dual diagnosis: A review of etiological theories . Addictive Behaviors , 23 ( 6 ) : 717 – 734 .
- Hilgers , M. 2009 . Habitus, freedom & reflexivity . Theory & Psychology , 19 ( 6 ) : 728 – 755 .
- Pickard , H. 2012 . The purpose in chronic addiction . AJOB Neuroscience , 3 ( 2 ) : 40 – 49 .
- Ravaisson , F. 2008 . Of habit , Edited by: Carlisle , C. and Sinclair , M. London , , UK : Continuum International Publishing .
- Rehm , J. , Gnam , W. Popova , S. 2007 . The costs of alcohol, illegal drugs, and tobacco in Canada, 2002 . Journal of Studies on Alcohol & Drugs , 68 ( 6 ) : 886 – 895 .