TY  - BOOK
AU  - Olesen,Jes
AU  - Tfelt-Hansen,Peer
TI  - Headache treatment: trial methodology and new drugs 
SN  - 0397517947
PY  - 1997///
CY  - Philadelphia
PB  - Lippincott-Raven Publishers
KW  - Headache
KW  - drug therapy
KW  - Clinical trials
ER  -