Mark A. Turrentine, “Correlative Analysis of MMP-2 and MMP-9 Expression with Serum β-hCG Levels in Invasive Gestational Trophoblastic Disease Prognosis and Progression”, PJAOG, vol. 1, no. 1, pp. 12–20, Dec. 2022, doi: 10.70818/pjaog.v01i01.045.