Cross-country skiing at the 2002 Winter Olympics
The cross-country skiing events at the 2002 Winter Olympics were marred by drug problems. The winners of three races were disqualified after blood tests showed that three skiers had overly high red blood cell counts indicating the use of darbepoetin, a drug used to treat anemia.
Source: Wikipedia — Cross-country skiing at the 2002 Winter Olympics (CC BY-SA 4.0)