title: Re: Xu et al. Doppler ultrasound-guided percutaneous nephrolithotomy with two-step tract dilation for management of complex renal stones (Urology 2012;79:1247-1251).
authors.forename: Rohit
authors.initials: R
authors.lastname: Kathpalia
authors.forename: Swarnendu
authors.initials: S
authors.lastname: Mandal
authors.forename: Satya Narayan
authors.initials: SN
authors.lastname: Sankhwar
mesh_terms: D004106:Dilatation / Q000379:methods*; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000601:surgery*; D008297:Male; D009403:Nephrostomy, Percutaneous / Q000379:methods*