sniper said:to me Bishop sounds fully credible.
i.e. riders being doped without knowing.
After he wasn't getting the big rides he discussed this with a mutual friend/teammate. He judged that not only did he have no faith in what "medical" measures they were taking but also had no assurances it would pay off for him in that team, or other team. Practically speaking he was in the same boat that Horner found himself in at F de J his first trip to Europe. Chris changed his mind later after fully exploring the possibilities on the domestic scene; which he dominated.
Andy just retired, I think.