@misc{indiciaeaf1564bde7fb,
  title = {[Controlled clinical studies: principles--indications--alternatives].},
  author = {D Hölzel and H J Lange and K K Uberla},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7045020/},
  note = {Source identifier: 7045020}
}