Widyastuty, A., Gultom, D.P. and Husada, M.S. 2019. Relationship of Advanced Paternal Age and Onset of Schizophrenia. Sumatera Medical Journal. 2, 1 (Jan. 2019), 22 - 27. DOI:https://doi.org/10.32734/sumej.v2i1.715.