sentences:  In 2008 together with Andriy Deryzemlya she won World Team Challenge.Khvostenko tested positive for ephedrine at a post event doping control at the Biathlon World Championships 2011 where the Ukrainian team had finished second in the Women's Relay.The team was later disqualified because of the anti-doping rule violation and Khyostenko received a one-year ban from sport, commencing on 13 March 2011.