Who was disqualified from the Tour de France in 2008?

In the 2008 Tour de France, Spanish cyclist Alberto Contador won the race, but several riders faced disqualification due to doping violations. Notably, the Italian cyclist Riccardo Riccò was disqualified after testing positive for a banned substance, EPO, during the race. Additionally, the entire team of Astana was initially barred from participation due to past doping scandals but was later allowed to compete.