Joyce Zakary, Kenya, 400 meter, unknown substance Francisca Koki, Kenya, 400 meter, unknown substance Alexander Yargunkin, Russia, Race walking, EPO Prior to the world championships, 28 athletes were provisionally suspended after re-analysis of their samples from world championships in 2005 and 2007 came back positive for prohibited substances. In the Anti-Doping Database we have 48 cases involving athletes from Kenya. 45 of these are participating in the sport of athletics. Norandrosterone was found in 20 of the cases. EPO in 6. Russia has suspended 216 athletes, 11 of these for EPO. Steroids are mostly used and involved in 91 cases. 40 percent of the athletes were suspended where the sample was collected out-of-competition.