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Donald Berry, a biostatistics professor at the University of Texas MD Anderson Cancer Center in Houston, said the study has too many limitations to draw any definitive conclusions.

“There’s no evidence that 9/11 caused any of these cancers,” Berry said.

He pointed out that no increased risks were found for lung cancer _ a cancer that might seem plausible after breathing lots of toxic dust and smoke.

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Online:

JAMA: http://www.jama.com

World Trade Center health effects: http://www.cdc.gov/niosh/topics/wtc/

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AP Medical Writer Lindsey Tanner can be reached at http://www.twitter.com.LindseyTanner