BBC News- How I Became A Drug Cheat To Test The System
Not surprising … pretty much sums up the dictum "Any system devised by a human can be defeated by a human".
Unfortunately the original Romano Roberts site is no longer up as he had some really interesting articles on PED's and sports. There was one related to Crossfit which I thought was incredibly informative and really highlighted the various dynamics at play e.g no organization really wants to catch their athletes, so….testing is done in a way that allows for some purposefully large wholes in the net.
Here is the article from the Internet time machine. Definitely worth the read if you're interested in steroids (and the politics) around their use: