Chronic Daily Headache: Theory to Therapy.  [electronic resource] 

 -  Current review of pain  1999 
 - 481-488 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1069-5850 
<br/><br/><label>Standard No.: </label>10.1007/s11916-999-0076-z  doi