Kenyan marathon runner Rita Jeptoo banned for four years for doping offence

• Jeptoo tested positive for recombinant EPO in 2014• Court of arbitration for sport extends initial two-year ban Kenyan marathon runner Rita Jeptoo has been banned for four years for a doping offence with "aggravating circumstances", the court of arbitration for sport have announced. The 35-year-old tested positive for recombinant EPO (rEPO), an artificially produced hormone stimulating red blood cell growth, in a sample given prior to winning the 2014 Chicago marathon. She was disqualified...