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4.
Indicate false sentences concerning vesico-ureteral reflux (VUR):
1) diagnosis is based on voiding cystourethrography;
2) we identify five grades of VUR;
3) only grade I primary VUR is treated conservatively;
4) refluxes with ureteral distension are treated surgically;
5) grade I, II, III VUR are treated conservatively.
The correct answer is: