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Ozone, composed of three oxygen atoms (O3), is a powerful oxidizing agent that reacts with pollutants, eliminating them and neutralizing odors in the process

Sample size calculation The formula for a cross-sectional study was used to calculate the sample size for each selected village: where p is the prevalence of hypertension in the Chinese population 13 , is the margin of error (to estimate prevalence with a precision is equal to half of the prevalence of hypertension), and deff is the effect of design ( deff =2)

Co-morbidity of Substance Misuse and Mental Illness Collaborative Study (COSMIC)

mass range, 40650 amu

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Between 2010 and 2016, smoking prevalence in the UK fell by over six percent for 18-24 year olds