@misc{indiciaef2cba967c5e2,
  title = {[Clinical research methods].},
  author = {H Helmchen},
  year = {2001},
  doi = {10.1055/s-2001-15304},
  url = {https://pubmed.ncbi.nlm.nih.gov/11488244/},
  note = {Source identifier: 11488244}
}