In recent years, scientists have identified thousands of genetic variants believed to influence everything from when people first try smoking to how good that first cigarette feels to how often they light up and how hard it is to quit. Some variants influence how quickly we metabolize nicotine, ...
USA) were inserted into the end of a plastic tube connected to a vacuum flask containing 20 mL water as described previously [22]. The other outlet of the flask was attached to a standard vacuum line. The cigarette/e-cigarette was lit, and smoke was extracted by using the vacuum to pull...