The data that not all tobacco products were equally harmful (i.e., smoked verus smokeless) was overshadowed by the trusim that there was some harm caused by all tobacco use
Given the catastrophic effect of tobacco on the health of patients who have undergone angioplasty, it is therefore possible that the transition of these smokers to e-cigarettes after the procedure could reduce the risks of complications and improve their survival
And in the season 4 episode 19 Malcolm plays chess with Leonard (Jason Alexander)
The mechanisms underlying such coupling of receptor activity are presently unknown but may either involve direct receptor interaction or a circuit based mechanism
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However, if the unit is supplied with filters of advanced technology (active carbon, cold plasma, ionizer etc), there is no problem.