@misc{indiciae926ef1beb662,
  title = {Ursodeoxycholic acid and gallstone calcification.},
  author = {R Raedsch and A Stiehl and P Czygan},
  year = {1981},
  doi = {10.1016/s0140-6736(81)91541-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/6118713/},
  note = {Source identifier: 6118713}
}