@misc{indiciaee026101b81a2,
  title = {Learning curve in endoscopic sinus surgery.},
  author = {S C Marks},
  year = {1999},
  doi = {10.1016/s0194-5998(99)70409-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/9949355/},
  note = {Source identifier: 9949355}
}