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If you are traveling by plane in the UK, you cannot put a lighter in your hold or hand luggage

Diabetic Retinopathy Smoking worsens diabetes-related eye damage by weakening blood vessels in the retina, increasing the risk of leaks, swelling, and blindness

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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)