Therefore, using e-cigarettes is often called вЂњvaping.вЂќ In addition, the various appearances and flavors of e-liquid are more appealing than conventional cigarettes, especially to teenagers and young adults ( 1). An e-cigarette is different from a combustible cigarette in that the user inhales vapor generated by the atomizer, which heats the e-liquid. The hot topics on e-cigarette research were extensive and changed over the past decade.Д®lectronic cigarettes (e-cigarettes), the electronic devices that simulate tobacco smoking, consist of an atomizer, a power source of battery generally, and a container such as a cartridge or a tank. E-cigarettes researches have become a popular field for scholars. The main research domains in this field were the prevalence, awareness, reasons for using e-cigarettes e-cigarettes use for tobacco harm reduction exposure in the population and the relationship between e-cigarettes and tobacco and nicotine. Nicotine & Tobacco Research was not only the journal with the most published papers but also the most co-cited journal. The most productive country and institution were the United States of America and the University of California San Francisco, respectively.

All publications involved 19837 authors, with the top ten authors contributing to 8.71% (695) of all documents. Overall, a total of 7,979 records were identified in the database and the number of researches increased rapidly since 2010. Visualizing maps were designed using VOSviewer 1.6.9 and CiteSpace 5.8 R2. Frequencies and percentages were used to describe the publications' characteristics. The data outputted from the Web of Science Core Collection database was used for bibliometric analysis. This study aimed to explore the landscape of research relating to e-cigarettes. 4School of Public Health, Shaanxi University of Chinese Medicine, Xianyang, ChinaД®lectronic cigarettes (E-cigarettes) use has increased rapidly in the past decades and has been widely studied by scholars worldwide, whereas the research topics and development trends in this field are still unclear.

3Evidence-Based Nursing Center, School of Nursing, Lanzhou University, Lanzhou, China.2Evidence-Based Medicine Center, Tianjin University of Traditional Chinese Medicine, Tianjin, China.1Clinical Research Center, Affiliated Hospital of Shaanxi University of Chinese Medicine, Xianyang, China.Xuechao Li 1 вЂ , Ting Zhang 2 вЂ , Liang Zhao 3, Qiling Liu 4, Chuandao Shi 4 and Rongqiang Zhang 4 *

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