1)Qi S, Li L, Liu R, et al:Impact of stone branch number on outcomes of percutaneous nephrolithotomy for treatment of staghorn calculi. J Endourol 28:152-157, 2014
2)Elbahnasy AM, Clayman RV, Shalhav AL, et al:Lower-pole caliceal stone clearance after shockwave lithotripsy, percutaneous nephrolithotomy, and flexible ureteroscopy:impact of radiographic spatial anatomy. J Endourol 12:113-119, 1998
3)Maghsoudi R1, Etemadian M, Shadpour P, et al:Number of tracts or stone size:which influences outcome of percutaneous nephrolithotomy for staghorn renal stones? Urol Int 89:103-106, 2012
4)Hamamoto S, Yasui T, Okada A, et al:Endoscopic combined intrarenal surgery for large calculi:simultaneous use of flexible ureteroscopy and mini-percutaneous nephrolithotomy overcomes the disadvantageous of percutaneous nephrolithotomy monotherapy. J Endourol 28:28-33, 2014