Müller, Arndt-Christian, Johannes Mischinger, Theodor Klotz, Bernd Gagel, Gregor Habl, Gencay Hatiboglu, and Michael Pinkawa. “Interdisciplinary Consensus Statement on Indication and Application of a Hydrogel Spacer for Prostate Radiotherapy Based on Experience in >250 Patients”. Radiology and Oncology 50, no. 3 (August 30, 2016). Accessed April 18, 2021. https://radioloncol.com/index.php/ro/article/view/2566.