But it seemed that teenage physical activity was particularly important in terms of the prevention of cognitive impairments."

VOA: special.2010.07.07

He's particularly interested in prevention of obesity and diabetes.

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The health board said it wanted to give assurances that there have been "major changes" since Mr O was an inpatient at the hospital, particularly around pressure ulcer prevention.

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The research on beta carotene supplements, however, particularly when it comes to heart disease prevention, has not shown the same benefits.

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