TY  - GEN
AU  - Aguirre,J J
TI  - [Observation on the classification of primary headaches]
SN  - 0213-4853
PY  - 2000///0801
KW  - Headache
KW  - classification
KW  - Humans
KW  - MMPI
KW  - Personality Disorders
KW  - complications
N1  - Publication Type: Comment; Letter
ER  -