Jiang, K. et al. 2020. Percutaneous Nephrolithotomy vs. Retrograde Intrarenal Surgery for Renal Stones Larger than 2cm in Patients with a Solitary Kidney: A Systematic Review and a Meta-Analysis. Urology Journal. 17, 05 (Jul. 2020), 442–448. DOI:https://doi.org/10.22037/uj.v17i05.5609.