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| Methods | Allocation: randomised. Blindness: double ‐ blind. Duration: eight weeks. Setting: inpatients, China. Design: parallel groups. |
| Participants | Diagnosis: schizophrenia. N = 40. Sex: unclear. Age: unclear. |
| Interventions | 1. Ginkgo biloba (240 mg/day). N = 21.
2. Placebo. N = 19. Stable antipsychotic: antipsychotics, no further description. |
| Outcomes | Leaving the study early. BPRS. SANS. |
| Notes | Very probably a subsample of Luo 1997 |
