BRAVE TO THE CORE: Sumgong proved critics wrong with London win

Kenya's Jemima Sumgong in action during the women's race Action Images via Reuters / Peter Cziborra Livepic EDITORIAL USE ONLY.

When Jemimah Jelagat Sumgong tested positive for banned substance prednisolone in her post-race anti-doping test after finishing second at the 2012 Boston Marathon, all hell broke loose.

Athletics Kenya handed her a two-year ban, but she was cleared after an appeal to IAAF. The federation said the injection she received was permitted under IAAF rules.