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Animal groups and treatments.
| Group | Drug | N | Duration of treatment (days) |
|---|---|---|---|
| I | – | 8 | – |
| II | Tween-80 | 10 | 45 |
| III | 20% ethanol | 10 | 45 |
| IV | 25 mg/kg of d-limonene | 10 | 45 |
| V | 75 mg/kg of d-limonene | 10 | 45 |
| VI | 25 mg/kg of d-limonene | 5 | 30 |
| VII | 75 mg/kg of d-limonene | 5 | 30 |
