Veisani, Y., E. Jenabi, A. Delpisheh, and S. Khazaei. “Angiogenic Factors and the Risk of Preeclampsia: A Systematic Review and Meta-Analysis”. International Journal of Reproductive BioMedicine (IJRM), Vol. 17, no. 1, Mar. 2019, pp. 1-10, doi:10.18502/ijrm.v17i1.3815.