Tramèr, M R <br/><br/>
A difference is a difference if it makes a difference.  [electronic resource] 

 -  Anesthesia and analgesia  Dec 1998 
 - 1460 p.  digital 
<br/><br/> Publication Type: Comment; Letter 
<br/><br/><label>ISSN: </label>0003-2999 
<br/><br/><label>Standard No.: </label>10.1097/00000539-199812000-00067  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Analgesia, Epidural--adverse effects<br/>Analgesics, Opioid--adverse effects<br/>Humans<br/>Meta-Analysis as Topic<br/>Pain, Postoperative--drug therapy<br/>Pulmonary Atelectasis--etiology<br/>Statistics as Topic