Took me quite some time to find back where I read about that.

Check that out :

https://inrng.com/2017/12/chris-froomes-salbutamol-case/

https://sportsscientists.com/2017/12/brief-thoughts-froomes-...

The article you gave, they only state the principle of PEDS evasion tactics, some used a fake dick when it's time to urinate, some used compound modified, but it can't possibly tell every single way that scientists found to avoid detection.

Froom is an actual athlete that got caught, that speak louder.

Beside i heard it too in completely unrelated sport circle, running (sprint) and boxing from athlètes competing.