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Assessment of Necessity of Retrograde Filling during PCNL Tract Dilatation. J. Bahria Univ. Med. Dent. Coll. [Internet]. 2025 Aug. 27 [cited 2026 May 9];15(02):80-5. Available from: https://jbumdc.bahria.edu.pk/index.php/jbumdc/article/view/8