Hendriati, D.; Effendy, E.; Amin, M. M.; Camellia, V.; Husada, M. S. Brain-Derived Neurotropic Factor Serum Level and Severity Symptom of Bataknese Male Patients With Schizophrenia in North Sumatera, Indonesia. Open Access Maced J Med Sci 2019, 7, 1957-1961.