The rules say they are for adults only
In other words, there is the potential for a water pipe smoker to take in as much nicotine by smoking one water pipe as you can by smoking 10 cigarettes
And so, it was kinda hard for me to follow those huge footsteps of my dad's
However, you should not let this seduce you into becoming careless
For research question 3, the above process was repeated except that the second intermediate weight was calculated from models predicting vaping status among ever smokers, and the final analysis was a weighted logistic regression of non-smoking status on SEP, vaping, and their interaction among ever smokers only (since all never smokers are non-smokers)
Flue-curing of tobacco (though slow to catch on in Italy) combined with a machine that could roll thousands of cigarettes per hour produced a mild, inexpensive, and easily-consumed nicotine delivery system, starting in the US in the 1880s