TY  - RPRT
TI  - Experts sort out headache classification, new guidelines for physicians to debut.
AU  - Mike Mitka
PY  - 2003
DO  - 10.1001/jama.290.6.736
UR  - https://pubmed.ncbi.nlm.nih.gov/12915412/
ID  - 12915412
ER  -