Serudji, J. et al. 2017. RESEARCH Difference in Mean Levels of Calcium Magnesium Ratio and Sodium Potassium Ratio of Maternal Serum Between Severe Preeclampsia and Eclampsia. Andalas Obstetrics And Gynecology Journal. 1, 1 (Jan. 2017), 22–29. DOI:https://doi.org/10.25077/aoj.1.1.22-29.2017.