Now, I remember there was a post about this recently where someone said she thought one of the authors might have been Swedish...I think this might be it. The article itself is from a Canadian thyroid site, but there is a reference to a study where one of the names is Danish. If someone knows which post I am referring to, please link to it here.
Anyway, here is the article; personally, I have to say it's one of the best I've read so far because it basically recognises that we are all different so have different needs: