TY  - RPRT
TI  - Reliability in headache diagnosis.
AU  - R B Lipton
AU  - W F Stewart
AU  - K R Merikangas
PY  - 1993
DO  - 10.1177/0333102493013s1207
UR  - https://pubmed.ncbi.nlm.nih.gov/8500144/
ID  - 8500144
ER  -