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Easily remove marks and graffiti from your sign while resisting abrasion, fading and weathering from all the elements.

Survival rates remain poor, with a global five-year survival rate below 20%, and significant geographic variations persist, reflecting differences in risk factors, healthcare access, and screening practices

In this study, we applied a special multistage sampling methods due to the low prevalence of tobacco smoking among female population in China (about 3%), in which we choose one male smoker and one female smoker from each selected households whenever possible to increase the sample size of female smoker, is another strengthen of this study