Twinning and oesophageal atresia.
D004200:Diseases in Twins; D004739:England; D004933:Esophageal Atresia / Q000453:epidemiology / Q000209:etiology / Q000235:genetics* / Q000401:mortality; D005260:Female; D005306:Fertilization; D005313:Fetal Death; D006801:Humans; D007086:Illegitimacy; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D010063:Ovum; D011247:Pregnancy; D012621:Seasons; D012737:Sex Factors