@misc{indiciaeab8333009905,
  title = {NPO includes chewing gum.},
  author = {B Kradel and A Hackett and R Johnstone},
  year = {1992},
  doi = {10.1213/00000539-199204000-00032},
  url = {https://pubmed.ncbi.nlm.nih.gov/1554137/},
  note = {Source identifier: 1554137}
}