@misc{indiciaec1f99bf2d759,
  title = {Selectivity within primary health care.},
  author = {J A Walsh},
  year = {1988},
  doi = {10.1016/0277-9536(88)90408-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3388068/},
  note = {Source identifier: 3388068}
}