This smashing little piece explores those situations where a new treatment is so good that a randomised trial is unnecessary. The mother’s kiss technique for removing foreign bodies from pre-school nostrils is a memorable example; there are many others from the field of surgery, and a formula for measuring real effects from background noise. […]
BMJ 17 Feb 2007
![](https://stg-blogs.bmj.com/bmj/files/2017/02/richard-lehman.jpg)