[MikeTaylor]

SIDE-ISSUE ALERT!

The article ends with the statement "The author declares no competing interests". I think this is very poor phrasing, as it's ambiguous: does it mean "The author has not declared any competing interests", or "The author has positively declared that there are no competing interests"?

(To be clear, I am not for a moment suggesting any hidden interests on the part of the author, and I think his point is both correct and important. It's only the wording that I dislike.)

[timr]

This is a stock phrase used by the journal. The author didn't write the words, he just checked a box on a form.

[gameshot911]

To me it's not ambiguous - it means the latter.