Emerging Phenomenon of Electronic Cigarettes Page 3 Frontiers Direct health implications of e cigarette use: a systematic scoping review with evidence assessment Analysis suggests e cigarette use may be linked to lower rates of smoking First comparison of dangers of tobacco cigarettes, e cigarettes and waterpipes Teen Smoking UT MD Anderson Electronic Cigarette Use and Risk of Hypertension: The Hispanic Community Health Study Study of Latinos (HCHS SOL) ScienceDirect