https://www.nature.com/articles/s41467-020-15665-3
Authors. Vousdoukas, M. I. et al
Venue. Nature Communications 11:2119
How the Institute flags it
established 4 times frontier 2 times
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.