TY - JOUR AU - Van Cangh, P; Smith, A D; Ng, C S TI - Management of difficult kidney stones JO - J Endourol IS - 05 VL - 21 PY - 2007 DO - 10.1089/end.2007.9965 L3 - PubMed-ID: 17523899 SP - 478 EP - 489 N1 - , et al. ER -