Management of pregnancy in patients with complex congenital heart disease: a scientific statement for Healthcare Professionals from the American Heart Association - Canobbio, M M; Warnes, C A; Aboulhosn, J; American Heart Association Council on Cardiovascular and Stroke Nursing; Council on Clinical Cardiology; Council on Cardiovascular Disease in the Young; Council on Functional Genomics and Translational Biology; Council on Quality of Care and Outcomes Research (Circulation, 2017)