Surbakti, Khairul Putra, Hasan Sjahrir, Rosita Juwita-Sembiring, and Erna Mutiara. 2017. “Effect of Flunarizine on Serum Glutamate Levels and Its Correlation With Headache Intensity in Chronic Tension-Type Headache Patients”. Open Access Macedonian Journal of Medical Sciences 5 (6):757-61. https://doi.org/10.3889/oamjms.2017.172.