title: Seasonal influences on the risk of cardiac malformation. Nature of the problem and some results from a study of 10,077 cases.
mesh_terms: D001017:Aortic Coarctation / Q000453:epidemiology; D004374:Ductus Arteriosus, Patent / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D006330:Heart Defects, Congenital / Q000453:epidemiology*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009864:Ontario; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology; D011666:Pulmonary Valve Stenosis / Q000453:epidemiology; D012409:Rubella / Q000453:epidemiology; D012621:Seasons; D012737:Sex Factors; D014188:Transposition of Great Vessels / Q000453:epidemiology