V. . Phupong, P. . Tanbirojn, and R. . Lertkhachonsuk, “Serum Angiopoietin-1/Angiopoietin-2 at 16-18 Weeks of Gestation to Predict Preeclampsia”, J Health Sci Med Res, vol. 39, no. 5, pp. 373–379, Mar. 2022.