@misc{indiciaee33524106e7e,
  title = {Defining the learning curve for percutaneous nephrolithotomy.},
  author = {Darrell Allen and Tim O'Brien and Richard Tiptaft and Jonathan Glass},
  year = {2005},
  doi = {10.1089/end.2005.19.279},
  url = {https://pubmed.ncbi.nlm.nih.gov/15865512/},
  note = {Source identifier: 15865512}
}