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To account for the stratified multi-stage cluster sample, we considered the provincial domain as the strata variable and accounted for clustering by village/urban unit, enumeration area, and mother, by computing variances around means, proportions, and regression coefficients using a Taylor linearized variance approach that used a variance inflation factor to account for within-cluster homogeneity 22

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Here are a few: Healthlines 15 Tips for Quitting Smoking Smokefree.gov SmokefreeVET (for veterans enrolled in VA healthcare) quitSTART app Not all lung damage from smoking is reversible, but quitting can help you repair some of the damage

First-line nivolumab plus ipilimumab with two cycles of chemotherapy versus chemotherapy alone (four cycles) in advanced non-small-cell lung cancer: CheckMate 9LA 2-year update

Whether its smoking cigarettes or packing a dip, the result can often be the same: fewer snack breaks