TY  - RPRT
TI  - Cluster Headache and Cluster Variants.
AU  - Marc E. Lenaerts
PY  - 2003
DO  - 10.1007/s11940-996-0014-x
UR  - https://pubmed.ncbi.nlm.nih.gov/14516523/
ID  - 14516523
ER  -