I wondered about that as well. Did he give Oprah a time frame for his doping? I watched both interviews and don't recall his disclosing the years that he started and/or ended the doping. He had cancer in 1996, and Betsy Andreu alleged that he was doping before then. If he was doping all the way until his retirement from cycling in 2011, one has to wonder what additional health issues he's going to encounter.