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。
Hydrogen breath test for diagnosis of lactose malabsorption: the importance of timing and the number of breath samples.
呼气样本可以在任何地方采集，样本采集者无需接受任何医学培训，而且不会产生任何相关的生物危害风险。
They can be collected anywhere by people with no medical training, and there are no associated biohazard risks.
呼气样本可以在任何地方采集，样本采集者无需接受任何医学培训，而且不会产生任何相关的生物危害风险。
They can be collected anywhere by people with no medical training, and there are no associated biohazard risks.
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