no abstract per se. https://ebm.bmj.com/content/early/2023/07/24/bmjebm-2023-112311 (classic typos of ME/CSF)
Just the three instances! I think this shows a complete lack of care on the part of the writers, reviewers and editors. I have published, edited, and reviewed papers and I would be very angry with myself for missing three instances of this typo in just one paragraph.