| Study | Reason for exclusion |
|---|---|
| Bisgaard 2005 | STAY trial; budesonide/formoterol in a single inhaler as maintenance and reliever compared to same dose single inhaler as maintenance and terbutaline as reliever |
| Boskovska 2001 | Formoterol twice daily versus salbutamol as‐needed |
| Cheung 2006 | Cross‐over |
| Kesten 1991 | Randomised to formoterol or albuterol twice daily plus albuterol as‐needed |
| O'Connor 2000 | Cross‐over |
| Richter 2007 | Formoterol as maintenance versus formoterol as‐needed |
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