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(AP) -- Microsoft co-founder and billionaire investor Paul Allen says a test this week showed he is free of cancer.

Allen's diagnosis of non-Hodgkins Lymphoma was made public in November 2009. He is also a survivor of another immune system cancer, Hodgkin's lymphoma, which he battled more than 20 years ago.

Allen owns the Portland Trail Blazers, an NBA team. In an interview on the team's official site, he said a follow-up cancer test was "clean."

Allen also said he feels better than he has in a long time, and that attending basketball games helped take his mind off his health problems.

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