1. Percutaneous Nephrolithotomy in the United Kingdom: Results of a Prospective Data Registry 
James N. Armitage, Stuart O. Irving, Neil A. Burgess 
European Urology 
Volume 61, Issue 6, Pages (June 2012)
DOI: /j.eururo
Copyright © 2012 European Association of Urology Terms and Conditions

2. Fig. 1 Distribution of stone size and type.
European Urology  , DOI: ( /j.eururo )
Copyright © 2012 European Association of Urology Terms and Conditions

3. Fig. 2
Stone clearance rates on the first postoperative day according to stone size and characteristics.
European Urology  , DOI: ( /j.eururo )
Copyright © 2012 European Association of Urology Terms and Conditions