However, based on findings of a recently released study by the RAND Corporation in the journal, Health Affairs, waiting for the resolution of these claims can take up more than 10 percent of the average medical career.

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The authors of the study in PNAS say environmental factors are undoubtedly important, but based on their findings they believe linguistic processes are innate.

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The study was based on incomplete data, according to one of the researchers, and others have cast doubt on the findings.

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