@article{null,
  title={Relevance of Psychosocial Factors in Oral and Facial Pain and Headache },
  author={barry j. sessle},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={31},
  number={3},
  pages={197--198},
  doi = {10.11607/ofph.2017.3.e},
  year={2017}
}