Figure 4
![Figure 4](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1472-6963-7-106/MediaObjects/12913_2006_447_Fig4_HTML.jpg)
The probability of gaps, medication free periods of several lengths, in the total population and stratified for new and previous use.
The probability of gaps, medication free periods of several lengths, in the total population and stratified for new and previous use.