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Reasons for withdrawal from the trials
| Reasons for withdrawal | No. of patients in series A | No. of patients in series B |
| Perceived lack of efficacy | 4 | 2 |
| Perceived side effects | 1 | 1 |
| Duration of trial period too long | 1 | - |
Series A: NSAIDs or paracetamol for osteoarthritis
Series B: reduction of temazepam for sleep disturbances
