Former reporter Susan Yara took the Biophysical250 test after years of low-level but persistent digestive discomfort that was never accurately diagnosed, despite numerous tests for thyroid disorders and irritable bowel syndrome.

FORBES: An Uneasy Mark

Gatlin, the 2005 world 100m and 200m champion, gave a positive test for testosterone at the low-level Kansas Relays in April 2006.

BBC: Gatlin won the 100m title at the Athens Olympics in 2004