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Questionnaire A structured and self-administered questionnaire was developed in English for the collection of data on sociodemographic characteristics, self-reported smoking status, and household SHS exposure, as described elsewhere 4,5

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Time since quitting and vaping, however, continued to show independent protective effects

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Get Your Free Case Review Who Is Responsible The Tobacco Companies That Lied to You for Decades For over 50 years, the largest cigarette manufacturers in the world conspired to hide what they knew: that smoking causes cancer, that nicotine is addictive, and that their products kill