Proposition for new terminologies in PCNL: what does 'ultra-mini-micro' actually mean?
Urolithiasis (2014) - Comments
pubmed: 25085200  doi: 10.1007/s00240-014-0696-6  issn: 2194-7236  issn: 2194-7228 

Anna E. Wright, Bhaskar K. Somani, Nicholas J. Rukin