@misc{indiciae981e92c7bd39,
  title = {Bromhexine in chronic bronchitis.},
  author = {F Christensen and J Kjer and S Ryskjaer and P Arseth-Hansen},
  year = {1970},
  doi = {10.1136/bmj.4.5727.117-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/4919405/},
  note = {Source identifier: 4919405}
}