@misc{indiciaef1fb22b89b61, title = {Characteristics of chronic posttraumatic headache.}, author = {David C Haas}, year = {2002}, doi = {10.1046/j.1526-4610.2002.02039.x}, url = {https://pubmed.ncbi.nlm.nih.gov/12005299/}, note = {Source identifier: 12005299} }