Ferrero S, Scala C, Stabilini C, Vellone VG, Barra F, Leone Roberti Maggiore U. Transvaginal sonography with vs without bowel preparation in diagnosis of rectosigmoid endometriosis: prospective study. Ultrasound Obstet Gynecol 2019;53:402-409.
https://obgyn.onlinelibrary.wiley.com/doi/abs/10.1002/uog.19194