@misc{indiciae488ccfde1a73,
  title = {Backache relieved by polystyrene mattress.},
  author = {H Hill},
  year = {1973},
  doi = {10.1016/s0140-6736(73)91243-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/4118550/},
  note = {Source identifier: 4118550}
}