Percutaneous nephrolithotomy in patients with solitary kidney: a critical outcome analysis - Torricelli, Fabio C. M.; Padovani, Guilherme P.; Marchini, Giovanni S.; Vicentini, Fabio C.; Danilovic, Alexandre; Reis, Sabrina T.; Srougi, Miguel; Mazzucchi, Eduardo (International Brazilian Journal of Urology, 2015)