Electronic cigarettes: a systematic review of available studies on health risk assessment

@article{Zulkifli2016ElectronicCA,
  title={Electronic cigarettes: a systematic review of available studies on health risk assessment},
  author={Aziemah Zulkifli and Emilia Zainal Abidin and Najihah Zainol Abidin and Amer Siddiq Amer Nordin and Sarva Mangala Praveena and Sharifah Norkhadijah Syed Ismail and Irniza Rasdi and Karmegam Karuppiah and Anita Abd Rahman},
  journal={Reviews on Environmental Health},
  year={2016},
  volume={33},
  pages={43 - 52},
  url={https://api.semanticscholar.org/CorpusID:3702954}
}
There is a need to perform more studies on HRA of e-cigarettes by using uniformed and comprehensive steps and similar reference threshold levels of exposures, as there are limited HRA studies and the ones that were available provided inconsistent scientific evidences.
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