Concussions in sport Doping in pigeon racing Equine drug testing Gene doping Mechanical doping Stem cell doping Technology doping References Further reading Mottram, David (2005); Drugs in Sport, Routledge. . Murray, Thomas H. (2008); "Sports Enhancement", in From Birth to Death and Bench to Clinic: The Hastings Center Bioethics Briefing Book for Journalists, Policymakers, and Campaigns. Waddington and Smith (2008); An Introduction to Drugs in Sport'', Routledge. . External links Anti-Doping Sciences Institute Banned Substances Control Group World Anti-Doping Agency Anti-Doping at the International Association of Athletics Federations Bioethics Drug testing