. 2018 Jun 3;2018:8916274. doi: 10.1155/2018/8916274
Copyright © 2018 Atle Hole Saeterbakken et al.
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Figure 1.
An overview of the study design.