1. Morente-Sánchez J, Zabala M. Doping in sport: a review of elite athletes’ attitudes, beliefs, and knowledge. Sport Med. 2013;43(6):395–411.
2. Henning A. Challenges to promoting health for amateur athletes through anti-doping policy. Drugs (Abingdon Engl). 2017;24(3):306–13.
3. United Nations Educational, Scientific and Cultural Organization (UNESCO). What is doping?
http://www.unesco.org/new/en/social-and-human-sciences/themes/anti-doping/youth-space/what-is-doping/
. Accessed 29 Mar 2018.
4. World Anti-Doping Agency (WADA). World Anti-Doping Code 2015. 2015.
https://www.wada-ama.org/en/resources/the-code/world-anti-doping-code
. Accessed 29 Mar 2018.
5. World Anti-Doping Agency (WADA). Anti-doping testing figures. 2003–2016
https://www.wada-ama.org/en/resources/laboratories/anti-doping-testing-figures-report
. Accessed 29 Mar 2018.