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| Study | Reason for exclusion |
|---|---|
| Babu 2013 | Review paper |
| Babu 2014 | Not an RCT |
| Barbosa 2011 | No exercise training |
| Becker Grunig 2013 | Not an RCT |
| Bernheim 2007 | Wrong patient population |
| Ehlken 2014 | Not an RCT |
| Fox 2011 | Not an RCT |
| Grunig 2011 | Not an RCT |
| Grunig 2012 | Not an RCT |
| Kabitz 2014 | Not an RCT |
| Kolesnikova 2011a | Wrong intervention |
| Kolesnikova 2011b | Wrong intervention |
| Marvisi 2013 | No exercise training |
| Nagel 2012 | Not an RCT |
| Robalo Cordeiro 2011 | No exercise training |
RCT: randomised controlled trial
