Serum levels of (a) TNF-α (b) TGF-β1 and (c) IL-6 in disease intervals 1–3 in relation to clinical outcome. Non-chronic NB: recovery within 6 months, chronic NB, no recovery within 6 months; NB neuroborreliosis. Disease interval 1: 0–3 months, disease interval 2: >3–12 months, disease interval 3: >12 months. Indicated in the boxplots are median (line), interquartile range (box), 95th percentile (whiskers), outliers (open circles) and extreme values (asterisks).