TY  - RPRT
TI  - Current concepts. Headache.
AU  - V S Caviness
AU  - P O'Brien
PY  - 1980
DO  - 10.1056/nejm198002213020806
UR  - https://pubmed.ncbi.nlm.nih.gov/6986029/
ID  - 6986029
ER  -