@article{charles r. carlson2009stress,
  title={Posttraumatic Stress Disorder Symptoms and Chronic Orofacial
Pain: An Empirical Examination of the Mutual Maintenance Model},
  author={jessica l. burris,melissa a. cyders,reny de leeuw,gregory t. smith,charles r. carlson},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={23},
  number={3},
  pages={243--252},
  doi = {10.11607/ofph.23.3.10},
  year={2009}
}