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Winner: Geek Bar Pulse Performance Comparison The dual mesh coil designs of these two Geek Bars make for a very similar vaping experience

Last year, an FDA study estimated that over 2 million US middle-school and high-school students used e-cigarettes

*Correspondence: Zdenka Pausova, Physiology and Experimental Medicine, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON M5G 1X8, Canada e-mail: [email protected] This article was submitted to Frontiers in Epigenomics and Epigenetics, a specialty of Frontiers in Genetics

Conclusions Modern cigarettes have been extensively engineered and optimized as nicotine delivery devices developed through major national and international research and development programs