Ekapatria, C. (2012). Placental Growth Factor Level is Lower in Early-Onset Preeclampsia, while Tumor Necrosis Factor Alpha Level does not Show any Difference between Early and Late Onset Preeclampsia. Indonesian Journal of Obstetrics and Gynecology, 36(4), 181–184. https://doi.org/10.32771/inajog.v36i4.322