@misc{indiciaebd2ebc8b5a24,
  title = {Habitual knuckle cracking and hand function.},
  author = {P A Simkin},
  year = {1990},
  doi = {10.1136/ard.49.11.957-b},
  url = {https://pubmed.ncbi.nlm.nih.gov/2256753/},
  note = {Source identifier: 2256753}
}