TY  - GEN
TI  - [How common is headache?]
SN  - 0029-1420
PY  - 1978///0628
KW  - Adolescent
KW  - Adult
KW  - Age Factors
KW  - Child
KW  - Cluster Headache
KW  - epidemiology
KW  - Female
KW  - Headache
KW  - Humans
KW  - Male
KW  - Middle Aged
KW  - Migraine Disorders
KW  - Sex Factors
N1  - Publication Type: Journal Article
ER  -