While type I interferons are known to induce expression of ISGs such as IFIT1 and IFIT3 [20–22], we did not detect altered expression of interferon alpha-2 (IFNA2) or interferon beta-1 (IFNB1) within Tregs from ITP patients (Figure S4A). The gene discussed is IFIT3; the disease is autoimmune thrombocytopenic purpura.