It should be noted that doping problems in professional cycling go back more than a century, and so do claims of innocence in order to retain medal status. So when Phonak Hearing Team cyclist Floyd Landis was accused of taking performance-enhancing drugs at the 2006 Tour de France, then tested positive for unusually high testosterone levels, he followed suit and kept his championship standing (although tour officials do not consider him to be the winner, and Phonak fired him after he tested positive). The reason he gave for the positive test was that the high level of testosterone was a "natural occurrence" and that the hormone was produced by his "own organism." Doctors, however, have scoffed at the notion that his body would produce that amount of testosterone naturally.