This is not a bug. The VisualEditor "cite" dialog (which has nothing to do with the Cite extension) just calls Citoid, which relies on CrossRef data, which is just what publishers provide. In this case, the publisher has uppercase titles:
https://api.crossref.org/works/10.1097/00007890-197506000-00010

Citoid can and should avoid introducing its own junk, but it's not within its scope to clean up the garbage provided by publishers.

In T245934#5910127, @Nemo_bis wrote:

This is not a bug. The VisualEditor "cite" dialog (which has nothing to do with the Cite extension) just calls Citoid, which relies on CrossRef data, which is just what publishers provide. In this case, the publisher has uppercase titles:
https://api.crossref.org/works/10.1097/00007890-197506000-00010

Citoid can and should avoid introducing its own junk, but it's not within its scope to clean up the garbage provided by publishers.

I mean, we *could* easily format titles to camel case. But I'm not sure that's what Citation bot is doing? It looks like it might be getting the metadata from pubmed instead. We used to do that, but had to turn it off because of performance issues. (Since we act in real time, we trade speed for accuracy in some places, and crossref is much faster) In which case, we should let Citation bot continue to do its thing :).