[Clinical features and significance of urinary tract infection in children].
D002648:Child; D002675:Child, Preschool; D006801:Humans; D006869:Hydronephrosis / Q000150:complications*; D011704:Pyelonephritis / Q000150:complications*; D014552:Urinary Tract Infections / Q000150:complications*; D014718:Vesico-Ureteral Reflux / Q000150:complications*