The guy behind CSC and Astana's drug testing programs thinks many drug positives are being classed as negatives, letting many cheats compete--and this is across all sport.
Legalities 'lag behind doping work'
BBC News
by Rasmus Damsgaard, MD, PhD
I am aware of a handful of athletes with urine samples that contain artificial EPO (erythropoietin). Nevertheless, these samples have been declared "negative" - the athletes have not even been accused and maybe never will...