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Comparative Evaluation of Swiss LithoClast 2® and Holmium:YAG Laser Lithotripsy for Impacted Upper-Ureteral Stones
http://online.liebertpub.com/doi/abs/10.1089/end.2007.0288
http://online.liebertpub.com/doi/abs/10.1089/end.2007.0288