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The tendency for other non-cardiac defects to occur in the patients with coarctation does not appear in their sibs and is not so pronounced as in some other congenital heart conditions. Of the several environmental variables examined, there was no definitive association with any other than season of birth, which implies a possible association with maternal infection; there is also a suggestion of a paternal age effect, but these require investigation in a prospective survey.<\/jats:p>","DOI":"10.1136\/jmg.13.6.420","type":"journal-article","created":{"date-parts":[[2008,11,10]],"date-time":"2008-11-10T14:50:51Z","timestamp":1226328651000},"page":"420-433","source":"Crossref","is-referenced-by-count":36,"title":["A family study of coarctation of the aorta."],"prefix":"10.1136","volume":"13","author":[{"given":"A R","family":"Boon","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D F","family":"Roberts","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"239","published-online":{"date-parts":[[1976,12,1]]},"reference":[{"key":"ref_1","first-page":"392","article-title":"Coarctation of the aorta","volume":"3","author":"Abbott, M.E.","year":"1928","unstructured":"Abbott, M. 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