Kenya 's athletic federation has banned runners ' agents for six months . Marathon world record holder Dennis Kimetto is a client of two of one banned management companies - Volare Sports and Rosa & Associati . Investigations into a doping spike among runners is set to take place .
Kenya 's athletic federation has banned runners ' agents for six months . Marathon world record holder Dennis Kimetto is a client of one of two banned management companies - Volare Sports and Rosa & Associati . Investigations into a doping spike among runners is set to take place .