Fig. 1From: Activin B is a novel biomarker for chronic fatigue syndrome/myalgic encephalomyelitis (CFS/ME) diagnosis: a cross sectional studyMean serum concentrations of a activin A, b activin B and c follistatin levels in study participants diagnosed with chronic fatigue syndrome (CFS/ME), compared to a study control group comprising healthy participants (study controls). d Ratio of activin B to follistatin levels (ActB:FST). Data are presented as mean ± SEMBack to article page