@misc{indiciae7c307098b9fb,
  title = {Disease surveillance at district level: a model for developing countries.},
  author = {T J John and R Samuel and V Balraj and R John},
  year = {1998},
  doi = {10.1016/s0140-6736(97)10494-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/9800768/},
  note = {Source identifier: 9800768}
}