Hydrogen breath test for diagnosis of lactose malabsorption: the importance of timing and the number of breath samples.

氢呼气试验诊断乳糖吸收障碍：呼气样本的数量和时间的重要性。

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All subjects underwent lactose hydrogen breath test.

所有研究对象均行乳糖氢呼气试验检查。

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All subjects underwent lactose hydrogen breath test.

所有研究对象均行乳糖氢呼气试验检查。

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