1. Bladder cancer: epidemiology, staging and grading, and diagnosis;Kirkali;Urology,2005
2. Recurrence and progression of disease in non?muscle-invasive bladder cancer: from epidemiology to treatment strategy;van Rhijn;Eur Urol,2009
3. EAU guidelines on non–muscle-invasive urothelial carcinoma of the bladder: update 2016;Babjuk;Eur Urol,2017
4. Multivariable prognostic models: issues in developing models, evaluating assumptions and adequacy, and measuring and reducing errors;Harrell;Stat Med,1996
5. Regression models for prognostic prediction: advantages, problems, and suggested solutions;Harrell;Cancer Treat Rep,1985