address new research work on influence of defacing on analyses

[PeerHerholz]

Hi gang,

just found this: https://link.springer.com/content/pdf/10.1007%2Fs00330-019-06459-3.pdf
and don't know if it's already addressed somewhere. In case that's not the case, we should do so.

[yarikoptic]

Eh damn, again no free lunch! Definitely worth referencing on the website and in the manuscript, good find! Thank you @PeerHerholz