Lausanne, Switzerland (My Sportsbook) - The Court of Arbitration for Sport (CAS) announced Thursday that it has upheld the appeal filed by Colombian cyclist Maria-Luisa Calle Williams.

As a result, Calle Williams will be permitted to keep the bronze medal that she earned at the 2004 Olympic Games in Athens.

The decision to uphold the medal stems from an August 29, 2004 ruling by the Executive Board of the International Olympic Committee (IOC) to disqualify Williams from the women's point race event.

Calle Williams finished third in the race, but the IOC Executive Board disqualified her following a positive anti-doping test with Heptaminol.

However, on October 21, 2004, Calle Williams filed an appeal and claimed she had been prescribed Neo-Saldina by a doctor attached to the Colombian National Olympic Committee delegation for a migraine headache.

It was finally determined that the presence of Heptaminol in her urine sample was not due to Calle Williams having ingested that substance, but was the result of the ingestion of Neo-Saldina containing Isometheptene, a substance which transforms into Heptaminol during laboratory analyses.

The CAS Panel stated that Isometheptene was not mentioned on the 2004 Prohibited List applicable at the Athens Games. In addition, CAS noted that there was not enough evidence to classify Isometheptene as a substance which is similar to one or several of the stimulants on the Prohibited List 2004.