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| Study | Reason for exclusion |
|---|---|
| Davidson 2000 | Relapse prevention study; participants were already diagnosed with PTSD |
| Gelpin 1996 | Non‐randomised trial and no placebo control group |
| Martenyi 2002 | Relapse prevention study; participants were already diagnosed with PTSD |
| Martenyi 2006 | Relapse prevention study; participants were already diagnosed with PTSD |
| Schelling 2004 | No comparison group |
| Vaiva 2003 | Participants were not randomised to treatment |
PTSD: post‐traumatic stress disorder
