Xu, Y., and P. Xu. “A Predictive Model of Nosocomial Infection in Patients With Upper Urinary Tract Stones After Flexible Ureterorenoscopy With Laser Lithotripsy: A Retrospective Study”. Pakistan Journal of Medical Sciences, Vol. 40, no. 3, Dec. 2023, doi:10.12669/pjms.40.3.8855.