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Those wishing to consume caffeine gums should do so sparingly
Classical Test Theory (CTT) criteria Table 5 provides a summary of the CTT analyses (according to the criteria defined in Supplementary S5), supporting the psychometric validity and reliability of the item-reduced measure

We welcome research articles, review articles as well as short communications covering the following subtopics related to the effect of tobacco and E-cigarette smoke: - Oxidative stress and Inflammation - Tobacco and E-cigarette smoke injury - Cardiovascular and non-cancer pulmonary diseases - Methylation impairment and post-translational modifications of proteins - Juul and E-liquid (nicotine, THC or CBD, propylene glycol, nickel, lead and ultrafine particles) 148,012 Total views 113,546 Article views 26,728 Article downloads 7,738 Topic views About Frontiers Research Topics With their unique mixes of varied contributions from Original Research to Review Articles, Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area
This includes an estimated 35 million users of our leading smoke-free product of whom 72 percent have switched completely and stopped smoking