TY  - RPRT
TI  - When headaches are good.
AU  - R C Packard
AU  - F Andrasik
AU  - R Weaver
PY  - 1989
DO  - 10.1111/j.1526-4610.1989.hed2902100.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2708037/
ID  - 2708037
ER  -