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Stage Two: Genetic Alterations Carcinogenic substances such as nitrosamines, polycyclic aromatic hydrocarbons (PAHs), and formaldehyde cause mutations in oncogenes and tumor suppressors (e.g., p53) present in the DNA of the mouth's lining

stockholders over a 115-year span

Similarly, we included different definitions of never-smoking, but never- established use can include those with nontrivial levels of tobacco use and experimentation [32, 33], which could confound the association between EC use and respiratory outcomes

Recent research indicates that cannabis slows the activity of retinal ganglion cells, potentially impacting how quickly your eyes perceive and process visual information

Both caffeine and nicotine are naturally occurring chemicals , produced by plants in order to protect against pests