In case you haven't noticed, i have co-authored with Polosa a review paper focusing on safety issues, and with more detailed presentation of evidence and misonceptions.
It is available with free access to the full text on pubmed.
Safety evaluation and risk assessment of electronic cigarettes as tobacco cigarette substitutes: a systematic review
It is available with free access to the full text on pubmed.
Safety evaluation and risk assessment of electronic cigarettes as tobacco cigarette substitutes: a systematic review