After winning the 2008 Six Days of Ghent, Belgian track specialist Iljo Keisse tested positive in both his A and B samples for cathine, a stimulant, and a diuretic that can be used to conceal other doping substances. The result ended his immediate career momentum: his team, Topsport Vlaanderen–Mercator, dismissed him on 11 January 2009, and he joined John Saey-Deschacht-Hyundai several months later. In November 2009, investigators cleared Keisse, concluding that the positive result was not intentional doping and was most likely caused by a contaminated dietary supplement. The case, however, did not end there. On 7 July 2010, the Court of Arbitration for Sport accepted the World Anti-Doping Agency’s appeal and reinstated Keisse’s ban, crediting him for the 11 months he had already served and making him eligible to return in August 2011. Belgian courts then produced a dramatic reversal: in November 2010, the Belgian Court of Appeals overturned the CAS decision and allowed him to compete in the Six Days of Ghent, although Keisse remained banned from competition in Belgium until 27 January 2012. The conflicting rulings made the episode a major controversy in Belgian cycling, balancing strict anti-doping rules against the possibility that an athlete had been punished for an accidental supplement contamination. Keisse ultimately re-signed with Omega Pharma–Quick-Step for the 2012 season and continued racing until his retirement in 2022.
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