' ' I 've been a part of the darkest era of cycling .
I 've also been part of very successful clean teams and I 've seen with my own eyes how this sport has changed in the past 15 years .
' ' I 've been a part of the darkest era of cycling , and I 've also been part of very successful clean teams and I 've seen with my own eyes how this sport has changed in the past 15 years .