Gálvez, Rafael <br/><br/>
Is morphine still the best reference opioid?  [electronic resource] 

 -  Pain management  Jan 2012 
 - 33-45 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>1758-1869 
<br/><br/><label>Standard No.: </label>10.2217/pmt.11.78  doi