title: Reply by the authors.
authors.affiliation: Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
authors.forename: Hequn
authors.initials: H
authors.lastname: Chen
authors.affiliation: Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Qi
authors.affiliation: Department of Urology, Xiangya Hospital, Central South University, Changsha, Hunan, China.
authors.forename: Long
authors.initials: L
authors.lastname: Wang
mesh_terms: D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000175:diagnosis* / Q000601:surgery*; D052177:Kidney Diseases, Cystic / Q000175:diagnosis* / Q000601:surgery*; D008297:Male; D009403:Nephrostomy, Percutaneous / Q000379:methods*