| Study | Reason for exclusion |
|---|---|
| NCT00176163 | After contacting trial author: study data were prepared for publication; study design with 4 groups (behavioural therapy + dronabinol, behavioural therapy + placebo, behavioural therapy alone, standard medical therapy) did not meet inclusion criteria |
| NCT01149018 | After contacting trial author: study was not conducted due to organisational reasons |
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