Maghsoudi, R., Etemadian, M., Kashi, A. H., & Ranjbaran, A. (2016). The Association of Stone Opacity in Plain Radiography with Percutaneous Nephrolithotomy Outcomes and Complications. Urology Journal, 13(6), 2899–2902. https://doi.org/10.22037/uj.v13i6.3669