@misc{indiciae8bc840eb1b4f,
  title = {Inter-doctor variation in sickness certification.},
  author = {G Tellnes and L Sandvik and T Moum},
  year = {1990},
  doi = {10.3109/02813439008994928},
  url = {https://pubmed.ncbi.nlm.nih.gov/2141431/},
  note = {Source identifier: 2141431}
}