9GoelR,AronM,KesarwaniPK,et al.Pereutaneous antegrade removal of impacted upper ureteral calculi:still the treatment of choice in developing countries[J]. J Endourol, 2005, 19(1): 547-550.
10Preminger G M, Assimos D G, Lingeman J E, et al. Chapter1 : AUAguideline on management of staghom calculi: diagnosis and treat -ment recommendations [ J ]. J Urol, 2005, 173 (6) : 1991.