TY  - RPRT
TI  - What predicts evolution from episodic to chronic cluster headache?
AU  - Paola Torelli
AU  - Gian Camillo Manzoni
PY  - 2002
DO  - 10.1007/s11916-002-0026-5
UR  - https://pubmed.ncbi.nlm.nih.gov/11749880/
ID  - 11749880
ER  -