TY  - RPRT
TI  - Classification of primary headaches.
AU  - R B Lipton
AU  - M E Bigal
AU  - T J Steiner
AU  - S D Silberstein
AU  - J Olesen
PY  - 2004
DO  - 10.1212/01.wnl.0000133301.66364.9b
UR  - https://pubmed.ncbi.nlm.nih.gov/15304572/
ID  - 15304572
ER  -