AUSTIN, Texas (AP) - Lance Armstrong has cut formal ties with his cancer-fighting charity to avoid further damage brought by doping charges and being stripped of his seven Tour de France titles.

Armstrong resigned from the board of directors for Livestrong on Nov. 4. He had previously resigned as chairman from the charity he founded Oct. 17 but had kept a seat on the board.

The U.S. Anti-Doping Agency ordered Armstrong banned from the sport for life and stripped of his titles. The International Cycling Union, which had originally supported Armstrong's fight, later agreed to wipe out Armstrong's record seven victories.

Livestrong spokeswoman Katherine McLane said Monday that Armstrong "remains the inspiration," and is still its largest donor with nearly $7 million over the years.

Meanwhile, the head of the World Anti-Doping Agency says the Lance Armstrong case is just part of a wide-ranging doping battle that will never be completely won.

Speaking at a conference on how to increase cooperation between the pharmaceutical industry and anti-doping bodies, WADA president John Fahey said "bubbling away below the surface there are still problems that could surface at any time."

The U.S. Anti-Doping Agency accused Armstrong of helping run the most sophisticated doping program in sports within his U.S. Postal Service and Discovery Channel teams.

USADA ordered Armstrong banned from the sport for life and stripped him of his seven Tour de France titles - a decision later ratified by the International Cycling Union.

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