Volinn, E <br/><br/>
Why does geographic variation in health care practices matter? (And seven questions to ask in evaluating studies on geographic variation).  [electronic resource] 

 -  Spine  Sep 1994 
 - 2092S-2100S p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0362-2436 
<br/><br/><label>Standard No.: </label>10.1097/00007632-199409151-00012  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geography<br/>Humans<br/>Low Back Pain--epidemiology<br/>Lumbar Vertebrae--surgery<br/>Outcome Assessment, Health Care<br/>Practice Patterns, Physicians'<br/>Professional Practice Location<br/>Small-Area Analysis<br/>United States--epidemiology