@misc{indiciaea84314305c8a,
  title = {Aims and implementation of multicentre studies.},
  author = {N Sartorius and H Helmchen},
  year = {1981},
  doi = {10.1159/000401351},
  url = {https://pubmed.ncbi.nlm.nih.gov/7322128/},
  note = {Source identifier: 7322128}
}