<sod>Cannabis dependency is often due to prolonged and increasing use of the drug. Increasing the strength of the cannabis taken and an increasing use of more effective methods of delivery often increase the progression of cannabis dependency.<ref>{{Cite journal|url = http://bjp.rcpsych.org/content/182/4/330|title = Adolescent precursors of cannabis dependence: Findings from the Victorian Adolescent Health Cohort Study|last = Coffey1, Carlin2, Lynskey3, Li4, Patton5|first = Carolyn1, John B.2, Michael3, Ning4, George C.5|date = 1/4/03|journal = The British Journal of Psychiatry|doi = 10.1192/bjp.182.4.330|pmid = |access-date = 17/4/15|volume=182|pages=330–336}}</ref><eod>
<sod>Cannabis dependency is often due to prolonged and increasing use of the drug. Increasing the strength of the cannabis taken and an increasing use of more effective methods of delivery often increase the progression of cannabis dependency.<ref>{{Cite journal|url = http://bjp.rcpsych.org/content/182/4/330|title = Adolescent precursors of cannabis dependence: Findings from the Victorian Adolescent Health Cohort Study|last = Coffey1, Carlin2, Lynskey3, Li4, Patton5|first = Carolyn1, John B.2, Michael3, Ning4, George C.5|date = 1/4/03|journal = The British Journal of Psychiatry|doi = 10.1192/bjp.182.4.330|pmid = |access-date = 17/4/15|volume=182|pages=330–336}}</ref> The use of cannabis for girls at a young age such as the teenage years, can have serious impacts on their depression and anxiety later in life.<ref>{{Cite web|url=https://ncpic.org.au/professionals/publications/factsheets/cannabis-and-young-people/|title=Cannabis and young people {{!}} NCPIC|last=NCPIC|website=ncpic.org.au|access-date=2016-09-30}}</ref><eod>