The ability to leave comments expires after a certain period of time.
So you may find that you’re unable to leave a comment on an article that is more than a few months old.
Here are some examples from the facial exercises article: The Northwestern University study is entitled, “Association of Facial Exercises With the Appearance of Aging,” and was recently published in JAMA Dermatology.
Here are the basics: “Both this pilot study, and the media coverage of it, have problems.
If your comment doesn't adhere to these policies, we won't post it. We welcome comments, which users can leave at the end of any of our systematic story reviews or at the end of any of our blog posts.