. 2020 Aug 4;148:e168. doi: 10.1017/S0950268820001727
© The Author(s) 2020
This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Fig. 1.
Flow chart of the study process.