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Tanra, A. J.; Sabaruddin, H.; Liaury, K. .; Zainuddin, A. A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Effect of Adjuvant Vitamin C on Brain-Derived Neurotrophic Factor Levels and Improvement of Negative Symptoms in Schizophrenic Patients. Open Access Maced J Med Sci 2021, 9, 353-357.