Serum sFlt-1/PlGF Ratio as an Early Predictor of Preeclampsia in High-Risk Pregnancies between 20–28 Weeks of Gestation: A Prospective Observational Study. (2023). Global Journal of Medical and Pharmaceutical Sciences, 1(1), 27-34. http://www.globapc.com/index.php/gjmps/article/view/22