Serudji, Joserizal, Helga Helga, and Hafni Bachtiar. 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):22-29. https://doi.org/10.25077/aoj.1.1.22-29.2017.