Congenital heart disease in twins.
D001017:Aortic Coarctation; D004200:Diseases in Twins; D004374:Ductus Arteriosus, Patent; D006330:Heart Defects, Congenital / Q000235:genetics*; D006344:Heart Septal Defects, Atrial; D006345:Heart Septal Defects, Ventricular; D006801:Humans; D011666:Pulmonary Valve Stenosis; D013771:Tetralogy of Fallot