STING1 and Aicardi-Goutieres syndrome: Patients 1 (A.II.3) and 2 (B.II.1), affected by a more severe phenotype, displayed at least on one occasion an elevated type I IFN score within the range seen in STING-associated vasculopathy with onset in infancy (SAVI) or Aicardi-Goutières syndrome (AGS) patients, while patient 6’s (C.II.4’s) score was markedly lower.