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First, the bias covariates used, although carefully extracted and evaluated, were based on observable study characteristics and thus may not fully capture unobserved characteristics such as study quality or context, which might be major sources of bias

Glass jars, metal containers, and other rigid receptacles offer protection that prevent pests from getting inside

Thornton : There's no question about that

To corroborate self-reported abstinence by subjects, an expired air carbon monoxide (CO) meter was used at each clinic and at all visits during the 12-month follow-up (we used a cut-off point of CO 6 ppm to be considered a non-smoker) 21

Therefore, it is always best to comply with the TSA guidelines to avoid any potential legal issues

Among these pollutants, PM2.5 is the most damaging