Ataei, M., B. Badehnoosh, M. Hashemnegad, R. Mirmajid, J. Razavi Shirazi, F. Dolatshad, and M. Farahani. “Preventing Preterm Birth in High-Risk Pregnant Women: Cerclage or Pessary? A Retrospective Cohort Study”. AVFT – Archivos Venezolanos De Farmacología Y Terapéutica, vol. 40, no. 2, May 2021, http://saber.ucv.ve/ojs/index.php/rev_aavft/article/view/22358.