Add new comment

Comment: 

In the data you looked at is it possible to tell if e-cigarette use was initiated before the myocardial infarction? From the abstract it doesn't seem to be able to tell when e-cigarette use was initiated or when the MI happened.

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.