Thus, serum levels of a cohort consisting of 73 LS patients and 26 healthy controls proved that TH1‐related interleukins IL‐2, IL‐2R and IL‐12, as well as chemokines CXCL9 and CXCL10 were increased and related to disease activity.44 The gene discussed is CXCL10; the disease is Leigh syndrome.