@article{peter svensson2020evidence,
  title={Further Evidence for Overlaps Among Chronic Pain Conditions—But No News About Causal Relationships},
  author={peter svensson,fernando exposto},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={34},
  number={S1},
  pages={6--8},
  doi = {10.11607/ofph.2020.suppl.c2},
  year={2020}
}