Autoantibody testing against two other autoantigens, KCNRG and BPIFB1, found in autoimmune polyendocrinopathy-candidiasis-ectodermal dystrophy (APECED) patients with autoimmune pneumonia, revealed no seropositivity in any of the SjD or IIM subjects (data not shown). The gene discussed is BPIFB1; the disease is autoimmune polyendocrine syndrome type 1.