Reduced Exposure to HPHC in Smokers Switching From Cigarettes to Different Versions of THS

Tobacco Heating System (THS) device with Blade technology for Blade tobacco stick use

Tobacco Heating System (THS) device with Induction technology (combined Charger-Holder device for Induction tobacco stick use).

Tobacco Heating System (THS) device with Induction technology (device with Induction stick Holder for Induction tobacco stick use and separate Charger).

Subject's preferred brand of commercially available regular (non-mentholated) cigarettes. (Cigarettes are not provided by the study sponsor.)