Elite female marathoners, front row from left, Rita Jeptoo, Mamitu Daska, Meserat Debele, Tirifi Beyene, Alemitu Begna, Shalane Flanagan, Ana Felix and Sabrina Mockenhaupt compete on the course in Wellesley, Mass., Monday, April 15, 2013. (AP Photo/Michael Dwyer)

Associated Press
Elite female marathoners, front row from left, Rita Jeptoo, Mamitu Daska, Meserat Debele, Tirifi Beyene, Alemitu Begna, Shalane Flanagan, Ana Felix and Sabrina Mockenhaupt compete on the course in Wellesley, Mass., Monday, April 15, 2013. (AP Photo/Michael Dwyer)
Elite female marathoners, front row from left, Rita Jeptoo, Mamitu Daska, Meserat Debele, Tirifi Beyene, Alemitu Begna, Shalane Flanagan, Ana Felix and Sabrina Mockenhaupt compete on the course in Wellesley, Mass., Monday, April 15, 2013. (AP Photo/Michael Dwyer)
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