@misc{indiciae6ecddca8184f,
  title = {[Gastroscopy before cholecystectomy].},
  author = {H Diettrich and B Wündrich and E Kobe and S Noack and K Weber},
  year = {1990},
  url = {https://pubmed.ncbi.nlm.nih.gov/2091671/},
  note = {Source identifier: 2091671}
}