HGH can only be detected by blood draws apparently.
https://www.wada-ama.org/en/questions-answers/human-growth-hormone-hgh-testing
Do the NRL and AFL do blood draws or just urine tests? Fark, every top level Footballer with the funds to run HGH could be on if that's the case.
I suspect that the testing would have been a lot more rigorous if someone won a Medal would it not, still just speculation. I'm always suspicious as to how far ahead of the testing the drug gurus are. If they hear about a new test being developed they tell their clients to pull out of the up coming event to avoid detection. Even if they stuff up their drug regime, DON'T COMPETE!