1 2 Pharmacology Biochemistry and Behavior
When testing air purifiers, our experts start with an extensive review of technical data provided by manufacturers on different units' ability to filter air and remove harmful materials like particulate matter (PM), volatile organic compounds (VOCs), and other harmful chemicals
In the final model, we included a spline on age, random slope on age by study and the bias covariate encoding exposure definition (that is, current, former and ever smokers), which was picked by the variable selection algorithm 28,29
Air out the room by opening windows when possible
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