A researcher discovers that, in one test, the charcoal filter and humidifier were turned off for the airflow administered to the mice. This data should be collected due to possible contamination with other unintended odors.
Basically, humidifiers add moisture to the air, a function that can be done in different ways, such as cold mist or hot mist. While air purifiers do not add moisture, but work the air through filters that seek to remove impurities.
With this information, we can conclude that should be collected due to possible contamination with other unintended odors.
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