TY  - RPRT
TI  - Cluster headaches--central or peripheral in origin?
AU  - J Schoenen
PY  - 1998
DO  - 10.1016/s0140-6736(05)60256-5
UR  - https://pubmed.ncbi.nlm.nih.gov/9690402/
ID  - 9690402
ER  -