Doping scandals : NUMBER@1 - NUMBER@2 In the most controversial scandal since the NUMBER@3 tour , thirteen riders were expelled from the NUMBER@1 MISC@1 stemming from a MISC@2 doping scandal , on the eve of LOCATION@1 prologue to the 93rd edition .

Doping scandal Thirteen riders were expelled from the NUMBER@1 MISC@1 because of a MISC@2 doping scandal .
