The acquittal of Danish cyclist Bo Hamburger for using the banned drug EPO has cast new doubts on the new blood and urine test for the blood-boosting drug.

Hamburger initially tested positive for EPO on 19 April at the tour of Fl�che Wallonne - the first rider to test positive under the International Cycling Union's testing procedure.

But in one of two B samples taken, the rate of EPO was below the 80% threshold and the Danish Sports Board cleared Hamburger.

The divergence between the two B sample results would seem to back up the complaints of some laboratory experts, who have criticised the UCI's new testing method, saying lab results differ with too high a margin from test to test.

"The tests are not 100% trustworthy but I think the UCI wanted to make one step forward to get things going and to diminish the massive use of EPO that has been observed in the cycling environment, " he told Danish newspaper Ekstra Bladet.

"The UCI definitely took some risks with introducing this test but now it will be interesting to see the legal effects it will have in the case of Bo Hamburger."

Lausanne is one of the 25 laboratories for doping control analyses accredited by the International Olympic Committee (IOC) and samples from athletes competing at the World Athletics Championships in Edmonton are currently being analysed there.

So the Hamburger case and Dr Rivier's remarks have implications far beyond professional cycling.

And the IOC, which introduced EPO testing before last year's Sydney Olympics, and the World Anti-Doping Agency (Wada) will be seeking to examine the details of the Hamburger case.

EPO meeting

Neither body was prepared to comment on Dr Rivier's remarks when contacted by BBC Sport Online on Friday.

But Nicki Vance, a director of Wada, said: "We are seeking to clarify the Hamburger case and the issue."

She confirmed that Wada would be holding a previously scheduled meeting in Lausanne to discuss EPO testing.

The meeting will be attended by representatives of a number of sports federations and the laboratories carrying out EPO testing.

With the Hamburger case, Rivier's remarks and events in Edmonton, they are sure to have plenty to discuss.