Figure 3
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1472-6947-6-21/MediaObjects/12911_2005_Article_110_Fig3_HTML.jpg)
The programmed PDA and sample screens. A: PDA in use. B: Screen used to collect data on cough. C: Screen used to collect data on sputum production.
The programmed PDA and sample screens. A: PDA in use. B: Screen used to collect data on cough. C: Screen used to collect data on sputum production.