Caesarian increases asthma risk

Is the headline given to this Thorax paper by the BBC, which also reports that the association was even stronger in children who had two parents with allergies.

The study is: well, I can't actually find it in Thorax, or anywhere else, so perhaps the BBC (and all the other media sources that appear in a search of G**gle for the author's name and the word "asthma") have got an advance copy.

I will try to come back to this another day and fill in the gaps. Meanwhile if you can find the Thorax paper, leave me a comment. Especially if I have missed it.