@misc{indiciaee92009f8a88c,
  title = {Assisting at gastroscopy.},
  author = {Gabriele Schindler and Rudolf Schindler},
  year = {2003},
  doi = {10.1067/mge.2003.100},
  url = {https://pubmed.ncbi.nlm.nih.gov/12612521/},
  note = {Source identifier: 12612521}
}