Skip to main content
. Author manuscript; available in PMC: 2020 Jan 8.
Published in final edited form as: Addiction. 2017 Oct 3;113(3):391–404. doi: 10.1111/add.14020

Figure 1. Flowchart of included articles in the hierarchy of methodological considerations.

Figure 1.

NOTE: Articles included towards the bottom of the flowchart have the strongest methodologies and provide the best evidence for the potential impact of e-cigarette use on cigarette smoking cessation or reduction.