“ In testing the reliability of the detection method, Lundby said urine samples from a group of eight male test subjects, who were injected with EPO over a four-week period in the summer of 2007, were sent to two different IOC-certified labs. One of the labs never found any of the samples to be positive, while the other was able to consistently identify positive samples when test subjects had recently injected a high dose of EPO.
VeloNews | Danish researchers raise questions about EPO test | The Journal of Competitive Cycling.