@article{joel d. greenspan2013temporomandibular,
  title={Chronic Temporomandibular Disorders Are Not Necessarily Associated with a Compromised Endogenous Analgesic System},
  author={pauline h. garrett,eleni sarlani,edward g. grace,joel d. greenspan},
  journal={Journal of Oral & Facial Pain and Headache},
  volume={27},
  number={2},
  pages={142--150},
  doi = {10.11607/jop.943},
  year={2013}
}