James, William H <br/><br/>
A further note on testing for a birth order effect in ankylosing spondylitis.  [electronic resource] 

 -  Arthritis and rheumatism  Jan 2003 
 - 283-4; author reply 284 p.  digital 
<br/><br/> Publication Type: Comment; Letter 
<br/><br/><label>ISSN: </label>0004-3591 
<br/><br/><label>Standard No.: </label>10.1002/art.10693  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birth Order<br/>Humans<br/>Risk Factors<br/>Spondylitis, Ankylosing--epidemiology