the frequency of hla-a , -b , and -dr alloantigens was studied in 46 patients with primary sjogren 's syndrome ( pss ) , 14 patients with secondary sjogren 's syndrome ( sss ) and rheumatoid arthritis ( ra ) , 26 classical ra patients without clinical or histologic evidence of sjogren 's syndrome ( ss ) and 172 normal controls .
C0003873
ra
C1527336
sjogren 's syndrome