So while the typical effective duration -- a measure of sensitivity to interest rates -- for global bond mutual funds run by peers is five or six years, his is less than two years.

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But taking into account the studies of recent years, government guidelines urge that "the minimum effective dose should be used for the shortest duration".

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It needed a shorter duration, and a larger size to be effective.

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Experts say the most effective way to treat diarrhoea is through a combination of ORS and zinc tablets, which decrease the severity and duration of an attack.

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