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.
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