0	0.08191	stone stones renal patients ureteral kidney urinary stent 
1	0.25499	patients studies risk analysis data age group significant 
2	0.14778	patients treatment sexual urinary symptoms dysfunction erectile italy 
3	0.07616	sperm semen group male levels parameters men testosterone 
4	0.1494	penile patients patient case cases surgery treatment disease 
5	0.07728	prostate cancer biopsy patients psa pca prostatic men 
6	0.10785	cancer bladder patients tumor carcinoma cell survival treatment 
7	0.14526	patients surgical surgery group complications time urol urinary