"And many of those that do come back positive are for recreational drugs with negligible performance-enhancing effects, like cannabis.
There are some in the anti-doping industry - and it is now an industry - who wonder why, if the point is to stop cheats, we bother testing for drugs that are deemed not to enhance performance.
And when it costs £65,000 for each positive, there are those who wonder why we bother testing for drugs at all."