von Knorring, L <br/><br/>
Circannual variation in concentrations of endorphins in cerebrospinal fluid.  [electronic resource] 

 -  Pain  Mar 1982 
 - 265-272 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0304-3959 
<br/><br/><label>Standard No.: </label>10.1016/0304-3959(82)90158-0  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Aged<br/>Chronic Disease<br/>Endorphins--cerebrospinal fluid<br/>Female<br/>Humans<br/>Male<br/>Middle Aged<br/>Pain--cerebrospinal fluid<br/>Seasons