@misc{indiciae4692c52a4fe7,
  title = {Research in developing countries.},
  author = {J M Belizán},
  year = {1992},
  doi = {10.1016/0140-6736(92)90322-t},
  url = {https://pubmed.ncbi.nlm.nih.gov/1347888/},
  note = {Source identifier: 1347888}
}