TY  - RPRT
TI  - Common headaches: type, duration, frequency and implications.
AU  - J N Blau
PY  - 1990
DO  - 10.1111/j.1526-4610.1990.hed3011701.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2074161/
ID  - 2074161
ER  -