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 (Oct. 2012), 181–184. DOI:https://doi.org/10.32771/inajog.v36i4.322.