8812
Thirteen of 15 patients with SS and 4/17 controls were HLA-DR3 positive , with no apparent association of HLA-DR3 with SSB reactivity in controls .
 SSB, HLA-DR3, HLA-DR3
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 SSB, HLA-DR3, HLA-DR3