@article{roger b. fillingim2020of,
  title={Associations of Psychologic Factors with  Multiple Chronic Overlapping Pain Conditions},
  author={roger b. fillingim,richard ohrbach,joel d. greenspan,anne e. sanders,nuvan rathnayaka,william maixner,gary d. slade},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={34},
  number={S1},
  pages={85--100},
  doi = {10.11607/ofph.2584},
  year={2020}
}