The International Olympic Committee (IOC) retested 454 selected doping samples from the Olympic Games Beijing 2008. The re-tests follow work with the World Anti-Doping Agency (WADA) and the International Federations. They were focused on athletes who could potentially start at the Olympic Games Rio 2016 and were conducted using the very latest scientific analysis methods. As a result up to 31 athletes from six sports could be banned from competing at the Olympic Games in Rio. The Executive Board of the IOC today agreed unanimously to initiate proceedings immediately, with the 12 NOCs concerned informed in the coming days. All those athletes infringing anti-doping rules will be banned from competing at the Olympic Games Rio 2016. Stanozolol most used since 2008 IOC cannot at this moment state which NOCs are involved, but let us look at the numbers: Since 2008 The Anti-Doping Database has registered 5107 cases from all sports and countries. Our numbers shows that Stanozolol is the substance most athletes test positive for. Since 2008 an improved analysis method has been developed which caused more Stanozolol cases. Methylhexaneamine has been involved in 407 of the doping cases since 2008, while Methandienone has been used in 309. The steroid Norandrosterone was used in 286, while Cannabis has been found in 240 of the samples. 235 athletes has tested positive for Erythropoietin (EPO), while 232 tested positive for testosterone. Athletics with the most cases Athletics is the sport with the most cases (1277), followed by weightlifting (603) and cycling (578). Rugby has clocked 213 cases since 2008, while wrestling has 182. In swimming we have registered 144 cases, while 111 boxers has been banned. We do think that the athletes involved competed in these sports: athletics, weightlifting, cycling, wrestling, swimming and boxing. Most athletes from India Our statistics also show that India is the country with the most cases (531), followed by Russia (519). USA has suspended 383 athletes, while Italy has banned 288. In France 180 athletes has been sanctioned for an anti-doping rule violation. Both the Czech Republic and United Kingdom has had 152 doping cases since 2008. Australia has had 149, while host nation Brazil has banned 123 since 2008. It is therefor likely to believe that among the 31 athletes, some of them will come from any of the nations mentioned above.