In that piece, is he talking about re-analysing the results of a urine test from 1999, with greater insight into EPO with what we know now, or literally re-testing urine from 1999
He was retesting the 1999 samples. When we collect samples, the assay must have a stability criteria that is established. Once a sample is outside that stability, the results cannot be deemed accurate. Mind you, it’s an interesting physiology that can “grow” a residual cysteine amino acid residue on endogenous# EPO!
The Science bit for those that care…
Artificial EPO is made by bacteria using recombinant DNA placed inside the cell. When they produce the protein, it is cleaved and leaves an extra amino acid on the end (cysteine). The old tests could not detect this – they just measured total levels of EPO in blood and urine. The new test can tell if the EPO being detected was made by your own body or by some bacteria in a fermentation plant in Thousand Oaks (Amgen).
Similarly, the new blood reticulocyte testing is fantastic and unequivocal. Your blood cells have a distribution of ages. Take some out and store them, and they stop ageing. Put them back in and you get a sudden large population of younger cells in the blood. Where did they magically come from?
The comment about Pfizer winning next years TDF made me laugh out loud! But you really meant Amgen vs. Janssen (Epogen vs. Eprex). Or will generic EPO from India make an entry?
#EDIT : endogenous = produced by your own body