Age
Anxiety
Assertiveness
BDI
Beck Depression Inventory
Behavioral treatment
Biofeedback
Chronic headache
Depression
EMG
Follow-up studies
Headache
Language
Mean
Migraine headache
MMPI
Patients
Rathus Assertive Schedule
Rating
Relaxation
Replication
Score
Social Readjustment Rating Scale
State Trait Anxiety Inventory
Tension
Trait
Trait anxiety
Treatment