https://www.frontiersin.org/journals/plant-science/articles/10.3389/fpls.2017.00287/full
Authors. Allen, Tilbrook, Warden et al
Venue. Frontiers in Plant Science 8:287
How the Institute flags it
established 1 time frontier 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.