RETN and myalgic encephalomeyelitis/chronic fatigue syndrome: IL1β, IL5, IL7, IL13, IL17A, IFNα2, IFNγ, TNFα, TRAIL (TNFSF10), CCL2, CCL7, CXCL5, CXCL9, CSF3 (GCSF), βNGF, resistin, serpin E1 (PAI1) in Atypical-ME/CFS-short duration compared to Classical-ME/CFS-short duration; IL7, IL17, CXCL9, serpin E1 in Atypical-ME/CFS-short duration compared to Classical-ME/CFS-long duration; IL5, IL13, IL17, CXCL9, in Atypical-ME/CFS-long duration compared to Classical-ME/CFS-short duration; IL6, IL17 in Atypical-ME/CFS-long duration compared to Classical-ME/CFS-long duration