HLA-DRB1 and rheumatoid arthritis: Previously we have demonstrated by single cell sorting using pMHCII multimers that HLA-DRB1*14:02-Vimentin59–71+ and HLA-DRB1*14:02-Vimentin59–71Cit64+ autoreactive T cells are oligoclonally expanded in the blood of RA patients, and that a representative HLA-DRB1*14:02-Vimentin59–71-reactive TCR cloned from the identified sequences could be restimulated with HLA-DRB1*14:02-Vimentin59–71 or HLA-DRB1*14:02-Vimentin59–71Cit64, but not HLA-DRB1*14:02-CLIP (6).