title: Letter: Aetiology of patent ductus arteriosus.
mesh_terms: D000328:Adult; D002648:Child; D004374:Ductus Arteriosus, Patent / Q000209:etiology* / Q000235:genetics; D005260:Female; D006801:Humans; D008431:Maternal-Fetal Exchange; D008875:Middle Aged; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000150:complications; D012409:Rubella / Q000150:complications