IL21 and myasthenia gravis: The mRNA levels of respective cytokines of the T cell subsets, namely IFNG, IL10, IL17A and IL21 and the related transcription factors (TBET, GATA3, RORC and PRDM1) in CD4+ T cells were similar in AChR-MG, MuSK-MG and CON groups (S3 Table).