@misc{indiciae76f36751768a,
  title = {Have you mastered PPS?},
  author = {Josephine Sienkiewicz and Mary Curry Narayan},
  year = {2002},
  doi = {10.1097/00004045-200205000-00009},
  url = {https://pubmed.ncbi.nlm.nih.gov/12045698/},
  note = {Source identifier: 12045698}
}