Over 10 weeks the gerbils' hearing improved.

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Children also showed improvement in hearing, skeletal rigidity or cardiovascular changes such as decreased arterial stiffness and improved vessel-wall density.

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The hearing coincided with the release of a report which said the centre had improved but there were still problems.

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The top agenda item for the Senate Governmental Affairs Committee hearing was to discuss how a budget would be developed and implemented under an improved system of intelligence coordination between civilian and military sectors.

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