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doi: 10.1186/s13643-018-0933-0 11

World Medical Association Declaration of Helsinki: ethical principles for medical research involving human subjects

The power source is the biggest component of an e-cigarette, which is frequently a rechargeable lithium-ion battery [3] (Figures 1 and 2)

While it may take years or decades for the effects of the uptick in E-cigarette use on BC risk to be fully appreciated, given the surge in popularity of E-cigarettes and the presence of bladder carcinogens in the urine of E-cigarette users, further research is urgently needed to investigate the carcinogenic properties of different E-liquids