E-cigarettes May Impair Ability to Quit, but Other Explanations Are Possible.

A letter to the editor is presented in response to the article "E-Cigarette Use in the Past and Quitting Behavior in the Future: A Population-Based Study" by W.K. Al-Delaimy, M.G. Myers, E.C. Leas, D.R. Strong, and C.R. Hofstetter which appears in a 2015 issue of the journal.