Steen, V D <br/><br/>
Incidence of systemic sclerosis in Allegheny County, Pennsylvania. A twenty-year study of hospital-diagnosed cases, 1963-1982.  [electronic resource] 

 -  Arthritis and rheumatism  Mar 1997 
 - 441-5 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0004-3591 
<br/><br/><label>Standard No.: </label>10.1002/art.1780400309  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Age Factors<br/>Aged<br/>Black People<br/>Female<br/>Humans<br/>Incidence<br/>Male<br/>Middle Aged<br/>Pennsylvania--epidemiology<br/>Scleroderma, Systemic--epidemiology<br/>Sex Factors<br/>White People<br/>Black or African American