This is probably the time to plug this wonderful extension [0] that directly warns you, whenever a link to a scholarly article is posted, that said article has had comments on its PubPeer entry.

For those who don't know, PubPeer was designed as a kind of forum where people can discuss articles after they're published (with or without a pseudonym). Of course, it almost instantly turned into a place for anonymous whistleblowing and call-outs for fraud, replication failure, etc. So while it's not an absolute rule, an article having one comment or two on PubPeer is usually a middling red flag for that article being generally dubious.

The reason I'm talking about all this is that the parent's link has twenty-five (25) comments on PubPeer. See for yourself, read the discussion and make of that what you will.

[0] https://addons.mozilla.org/de/firefox/addon/pubpeer/

Oops, you "forgot" this part of the study:

>Notice of republication

>After publication of this article [1], questions were raised that prompted the journal to conduct a post-publication reassessment of the article, involving senior members of the journal’s editorial team, two Academic Editors, a statistics reviewer, and an external expert reviewer.