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Blood doping refers to a handful of techniques used to increase an individual's oxygen-carrying red blood cells, and in turn, improve athletic performance. The most commonly used types of blood doping include injections of erythropoietin (EPO), injections with synthetic chemicals that can carry oxygen, and blood transfusions, all of which are prohibited under the World Anti-Doping Agency's (WADA) List of Prohibited Substances and Methods.
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