Situmorang, Dumaria, Hermie MM Tendean, and John J Wantania. “Placental Growth Factor Levels in Preeclampsia Compared to Normal Pregnancy”. Indonesian Journal of Obstetrics and Gynecology 3, no. 2 (April 21, 2015): 76–80. Accessed March 19, 2026. https://www.inajog.com/index.php/journal/article/view/31.