SFTPA2 and idiopathic interstitial pneumonia: We demonstrated that previously described rare, dominantly expressed mutations in SFTPC, SFTPA2 and TERT occur in patients with sporadic and familial IPF.4–10 However, our study is the first in which all genes associated with both IPF and/or childhood ILD were resequenced simultaneously in a cohort of individuals with both sporadic and familial IPF.