@misc{indiciaed4be99a80598,
  title = {The expanded program on immunization in Vietnam.},
  author = {Le Dien Hong},
  year = {1990},
  doi = {10.1177/101053959000400308},
  url = {https://pubmed.ncbi.nlm.nih.gov/2278760/},
  note = {Source identifier: 2278760}
}