Alshyarba, M. H. (2009) “Metachronous Emphysematous Pyelonephritis and Xanthogranulomatous Pyelonephritis in the Contralateral Kidney: An Extremely Rare Condition”, Urology Journal, 4(4), pp. 248–250. doi: 10.22037/uj.v4i4.108.