1. Illicit drug use in pregnancy: effects and management;RM Madgula;Expert Rev Obstet Gynecol,2011
2. World Drug Report 2014 [Internet],2014
3. European Drug Report 2014: Trends and developments [Internet],2014
4. Office for National Statistics. Crime Survey for England and Wales, 2013. [Internet]. [cited 2013 Dec 19]. Available: http://www.ons.gov.uk/ons/dcp171778_318761.pdf.
5. Public Health England. National Treatment Agency for Substance Misuse—Homepage [Internet]. [cited 2013 Oct 7]. Available: http://www.nta.nhs.uk/.