. Author manuscript; available in PMC: 2020 Jan 28.
Published in final edited form as: Addict Res Theory. 2019 Mar 19;28(1):53–61. doi: 10.1080/16066359.2019.1579803
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
Standardised packs used in the survey.