There is a step up trend of seriousness of diseases in different levels of hospitals, but the difference is not substantial.

各等级医院收治病人的严重程度呈现一定梯度，但差异并不明显。

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"We need to step up the way in which we are looking at this issue - it is a worrying trend that it is the English clubs who seem to be suffering the most, " said David Davies, the FA's director of international strategy.

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