Preliminary Results of an Examination of Electronic Cigarette User Puff Topography: The Effect of a Mouthpiece-based Topography Measurement Device on Plasma Nicotine and Subjective Effects … See original article here: Preliminary Results of an Examination of Electronic Cigarette User Puff Topography: The Effect of a Mouthpiece-based Topography Measurement Device on Plasma Nicotine and Subjective Effects