title: Letter: Urinary reflux and chronic pyelonephritis.
mesh_terms: D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D006801:Humans; D007223:Infant; D007684:Kidney Tubules / Q000502:physiology / Q000503:physiopathology; D011704:Pyelonephritis / Q000209:etiology*; D014718:Vesico-Ureteral Reflux / Q000150:complications / Q000503:physiopathology*