MMP1 and myalgic encephalomeyelitis/chronic fatigue syndrome: Further investigation and validation of these results is warranted, with additional cytokines and chemokines, e.g., 4E-BP1, AXIN1, and MMP-1, in which the metabolite sphingosine 1‐phosphate is of particular interest as it is part of the sphingolipid pathway (enriched in both QFS and CFS compared to HC).