From the CN Notes:
The two Italians have medical exemptions on file for treating asthma, while according to Eurosport, Mayo is known to be prone to natural testosterone variations, something he has documented previously with the UCI.
Smoke? Fire? These aren't nobodies. Petacchi especially had better get his files in order fast, lest he be barred from the Tour. If this is just a matter of submitting his asthma exemption, yo Ale-Jet, get on it! If not... let's not go there yet.