1. United Nations Office on Drugs and Crime. World drug report 2016. United Nations publication, Sales No. E.16.XI.7, Vienna, 2016.
https://www.unodc.org/doc/wdr2016/WORLD_DRUG_REPORT_2016_web.pdf
. Accessed 15 Nov. 2018.
2. European Monitoring Centre for Drugs and Drug Addiction. European Drug Report: trends and developments, 2014.
http://www.emcdda.europa.eu/system/files/publications/963/TDAT14001ENN.pdf
. Accessed 15 Nov. 2018.
3. European Monitoring Centre for Drugs and Drug Addictions. Statistical Bullettin 2017, 2017.
http://www.emcdda.europa.eu/data/stats2017_en
. Accessed 20 Oct. 2017.
4. World Health Organization. The health and social effects of nonmedical cannabis use, 2016.
http://who.int/substance_abuse/publications/msbcannabis.pdf
. Accessed 15 Nov. 2018.
5. Manrique-Garcia E, Zammit S, Dalman C, Hemmingsson T, Andreasson S, Allebeck P. Prognosis of schizophrenia in persons with and without a history of cannabis use. Psychol Med. 2014;44:2513–21.