Damanik, R., Effendy, E., & Husada, M. S. (2020). The Relation of Gene Polymorphism Interferon Gamma+874 A/T and Schizophrenia Occurred in Batak Ethnicity. Open Access Macedonian Journal of Medical Sciences, 8(A), 70–75. https://doi.org/10.3889/oamjms.2020.3975