. 2019 Jun 27;10:728. doi: 10.3389/fphys.2019.00728
Copyright © 2019 Dörmann, Wirtz, Micke, Morat, Kleinöder and Donath.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
FIGURE 1.
Participants flow through the study [adapted from Moher et al. (2010)].