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In psychology, we refer to this as negative reinforcement the behaviour persists because it removes discomfort

They undergo four key phases: wilting, yellowing, colouring, and drying

"The question was whether vape containing nicotine had negative effects on the ability to clear secretions from the airways similar to tobacco smoke," senior author Matthias Salathe, M.D., chair of internal medicine and a professor of pulmonary and critical care medicine at the University of Kansas Medical Center explained in a news release

Fluorescence Immunohistochemistry of HBE cells confirmed accumulation of both AIF and EndoG in the nucleus of smoke exposed cells (Fig

2012;7:e30584