TY  - RPRT
TI  - Headache classification: criticism and suggestions.
AU  - G C Manzoni
AU  - P Torelli
PY  - 2004
DO  - 10.1007/s10072-004-0255-y
UR  - https://pubmed.ncbi.nlm.nih.gov/15549572/
ID  - 15549572
ER  -