@misc{indiciaece5a68c73716,
  title = {[Problems in sputum sampling].},
  author = {K Matsumoto and S Arai and K Yokoyama and K Nishioka and T Nakamura},
  year = {1971},
  url = {https://pubmed.ncbi.nlm.nih.gov/5165335/},
  note = {Source identifier: 5165335}
}