TY  - RPRT
TI  - Defining the learning curve for percutaneous nephrolithotomy.
AU  - Darrell Allen
AU  - Tim O'Brien
AU  - Richard Tiptaft
AU  - Jonathan Glass
PY  - 2005
DO  - 10.1089/end.2005.19.279
UR  - https://pubmed.ncbi.nlm.nih.gov/15865512/
ID  - 15865512
ER  -