@misc{indiciaee897a3ec76a3,
  title = {Ankylosing spondylitis--experience with a self administered questionnaire: an analytical study.},
  author = {V S Ringsdal and J J Andreasen},
  year = {1989},
  doi = {10.1136/ard.48.11.924},
  url = {https://pubmed.ncbi.nlm.nih.gov/2596883/},
  note = {Source identifier: 2596883}
}