TY  - RPRT
TI  - Does single-file botox injection really work for primary headache?
AU  - Andrew Blumenfeld
PY  - 2004
DO  - 10.1111/j.1526-4610.2004.04158_2.x
UR  - https://pubmed.ncbi.nlm.nih.gov/15330839/
ID  - 15330839
ER  -