Deiana, Sara Francesca, Ileana Atzeni, Alessandra Meloni, Silvia Soddu, Giuseppina Parodo, Melania Puddu, Erica Vannelli, Alessandra Atzei, Gavino Faa, Vassilios Fanos, Gian Benedetto Melis, and Anna Maria Paoletti. “Placental Growth Factor and Placental Perfusion”. Journal of Pediatric and Neonatal Individualized Medicine (JPNIM) 3, no. 2 (October 21, 2014): e030248. Accessed October 24, 2021. https://jpnim.com/index.php/jpnim/article/view/030248.