@misc{indiciaead19693d453b,
  title = {Ambiguous relation between physical workload and low back pain: a twin control study.},
  author = {J Hartvigsen and K O Kyvik and C Leboeuf-Yde and S Lings and L Bakketeig},
  year = {2003},
  doi = {10.1136/oem.60.2.109},
  url = {https://pubmed.ncbi.nlm.nih.gov/12554838/},
  note = {Source identifier: 12554838}
}