TY  - RPRT
TI  - Characteristics of chronic posttraumatic headache.
AU  - David C Haas
PY  - 2002
DO  - 10.1046/j.1526-4610.2002.02039.x
UR  - https://pubmed.ncbi.nlm.nih.gov/12005299/
ID  - 12005299
ER  -