Because of the exploratory nature of this study, we wanted these selected genes to be as representative as possible for the RNA-Seq results as a whole: Three genes are related to B cells differentiation/survival (CD79A, FTL3) and B cell malignancies (BCL7A); in addition, these three genes are among the most under-expressed in the CFS group. Here, CD79A is linked to myalgic encephalomeyelitis/chronic fatigue syndrome.