http://www.newsweek.com/kamila-valieva-trimetazidine-l-carnitine-hypoxen-drugs-substabces-olympics-beijing-1679776 > Russian figure skater Kamila Valieva, who helped claim a gold medal for the Russian Olympic Committee in an Olympic figure skating event last week, has continued to perform amid an ongoing doping controversy. > The 15-year-old, who on Tuesday finished first in the women's individual skating event, has hit headlines after testing positive for the substance trimetazidine, which is banned for athletes under the World Anti-Doping Code.