Dr. Lynn Hillyer:

A number of drugs can be given shortly before racing in an attempt to affect performance. Adrenaline would be one of them. Cocaine could be another. Adrenocorticotrophic hormone, ACTH, which stimulates natural endogenous testosterone and other steroid production, is another. We are not detecting any of that in our sampling. That is both out-of-competition, which is the really important bit, and on race day.